Move zsh completion logic to new subcommand: tag
Move zsh completion logic to new subcommand: tag

Signed-off-by: Steve Durrheimer <a2c1a055e5b399822be341b4e663de3cd05cf8f7@gmail.com>

cpuguy83/docker,bearstech/moby,yasiramin10p/moby,duglin/docker,tophj-ibm/docker,estesp/docker,mtesselH/docker,danyalKhaliq10p/moby,thtanaka/docker,shhsu/docker,HideoYamauchi/docker,thaJeztah/docker,JMesser81/docker,Ramzec/docker,vdemeester/docker,bonczj/moby-json-file-logger,tophj-ibm/docker,ibuildthecloud/docker,trebonian/docker,akira-baruah/docker,thtanaka/docker,yosifkit/docker,unclejack/docker,bearstech/moby,xuxinkun/docker,xuxinkun/docker,cpuguy83/docker,madhanrm/docker,mikedougherty/docker,jimjag/docker,duglin/docker,jwhonce/docker,resin-io/docker,allencloud/docker,justincormack/docker,erikh/docker,nalind/docker,lixiaobing10051267/docker,cpuguy83/docker,kolyshkin/moby,alfred-landrum/docker,mstanleyjones/docker,rremer/moby,lixiaobing10051267/docker,jimjag/docker,dccurtis/docker,jimjag/docker,mkumatag/docker,moul/docker,mike1729/docker,KarthikNayak/docker,michael-holzheu/docker,bonczj/moby-json-file-logger,cpuguy83/docker,coolljt0725/docker,KarthikNayak/docker,hqhq/moby,sarnautov/moby,bonczj/moby-json-file-logger,nalind/docker,tmp6154/docker,tonistiigi/docker,moby/moby,danyalKhaliq10p/moby,resin-io/docker,pramodhkp/moby,x1022as/docker,resin-io/docker,PatrickLang/moby,SvenDowideit/docker,jameszhan/docker,SvenDowideit/docker,shishir-a412ed/docker,darrenstahlmsft/moby,nalind/docker,jameszhan/docker,madhanrm/docker,yongtang/docker,trebonian/docker,kolyshkin/moby,gjaskiewicz/moby,konstruktoid/docker-1,amatsus/docker,erikstmartin/docker,mtesselH/docker,KingEmet/docker,yummypeng/docker,gjaskiewicz/moby,KingEmet/docker,konstruktoid/docker-upstream,johnstep/moby-moby,paralin/docker,erikh/docker,moul/docker,naveed-jamil-tenpearls/moby,tonistiigi/docker,akira-baruah/docker,ripcurld0/moby,dccurtis/docker,erikstmartin/docker,ndeloof/docker,whuwxl/docker,dims/docker,PatrickLang/moby,PatrickLang/moby,moypray/docker,unclejack/docker,tmp6154/docker,moul/docker,liaoqingwei/docker,amatsus/docker,ffoysal/docker,jameszhan/docker,jvanz/docker,x1022as/docker,coolljt0725/docker,mikedougherty/docker,kencochrane/docker,kojiromike/docker,justincormack/docker,mkumatag/docker,ibuildthecloud/docker,darrenstahlmsft/docker,imkin/moby,YuPengZTE/docker,konstruktoid/docker-upstream,lixiaobing1/docker,nawawi/docker,sarnautov/moby,charleszheng44/moby,mstanleyjones/docker,djs55/docker,cyphar/docker,flavio/docker,pramodhkp/moby,darrenstahlmsft/moby,coolljt0725/docker,yummypeng/docker,SvenDowideit/docker,ffoysal/docker,vdemeester/docker,mikebrow/docker,coreos/docker,qudongfang/docker,darrenstahlmsft/docker,raja-sami-10p/moby,mikebrow/docker,nawawi/docker,kojiromike/docker,Ramzec/docker,dperny/docker,tianon/docker,yosifkit/docker,catinthesky/docker,dperny/docker,raja-sami-10p/moby,cyphar/docker,mixja/docker,tianon/docker,AkihiroSuda/docker,imkin/moby,mike1729/docker,HideoYamauchi/docker,diogomonica/docker,laijs/docker,AkihiroSuda/docker,Ramzec/docker,ibuildthecloud/docker,JMesser81/docker,moby/moby,dgageot/docker,trebonian/docker,haveatry/docker,sterchelen/docker,thtanaka/docker,crosbymichael/docker,rremer/moby,gnailuy/docker,johnstep/moby-moby,dsheets/moby,laijs/moby,fcrisciani/docker,erikstmartin/docker,konstruktoid/docker-upstream,ndeloof/docker,docker/docker,unclejack/docker,miminar/docker,allencloud/docker,tophj-ibm/docker,bearstech/moby,yosifkit/docker,docker/docker,flavio/docker,mtesselH/docker,charleszheng44/moby,q384566678/docker,POLJM242/docker,yongtang/docker,sdurrheimer/docker,yasiramin10p/moby,catinthesky/docker,srust/docker,tonistiigi/docker,ndeloof/docker,estesp/docker,srust/docker,mahak/docker,dsheets/moby,stevvooe/docker,mixja/docker,pradipd/moby,ripcurld0/moby,yosifkit/docker,scotttlin/docker,naveed-jamil-tenpearls/moby,danyalKhaliq10p/moby,ColinHebert/docker,kolyshkin/moby,maxamillion/docker,prertik/docker,jvanz/docker,liaoqingwei/docker,shhsu/docker,dperny/docker,mstanleyjones/docker,djs55/docker,gnailuy/docker,michael-holzheu/docker,prertik/docker,diogomonica/docker,dims/docker,kencochrane/docker,laijs/docker,dmcgowan/docker,ibuildthecloud/docker,coreos/docker,kolyshkin/docker,vdemeester/docker,thaJeztah/docker,estesp/docker,moby/moby,jwhonce/docker,dmcgowan/docker,lixiaobing10051267/docker,djs55/docker,duglin/docker,jlhawn/docker,gjaskiewicz/moby,ibuildthecloud/docker,yummypeng/docker,miminar/docker,jwhonce/docker,michael-holzheu/docker,allencloud/docker,kojiromike/docker,alfred-landrum/docker,shhsu/docker,scotttlin/docker,srust/docker,naveed-jamil-tenpearls/moby,crosbymichael/docker,dsheets/moby,stevvooe/docker,Ramzec/docker,Mokolea/docker,darrenstahlmsft/moby,sterchelen/docker,jlhawn/docker,alfred-landrum/docker,johnstep/moby-moby,thaJeztah/docker,fcrisciani/docker,gschaetz/moby,haveatry/docker,q384566678/docker,ColinHebert/docker,Mokolea/docker,Syntaxide/docker,ColinHebert/docker,stevvooe/docker,miminar/docker,noironetworks/docker,mikedougherty/docker,harche/docker,gschaetz/moby,mahak/docker,tophj-ibm/moby,sarnautov/moby,sdurrheimer/docker,crosbymichael/docker,cyphar/docker,tklauser/docker,mahak/docker,AkihiroSuda/docker,docker/docker,mike1729/docker,justincormack/docker,catinthesky/docker,bearstech/moby,noironetworks/docker,yasiramin10p/moby,charleszheng44/moby,flavio/docker,gnailuy/docker,tmp6154/docker,rancher/docker,rremer/moby,maxamillion/docker,coreos/docker,dgageot/docker,Syntaxide/docker,qudongfang/docker,mikebrow/docker,kencochrane/docker,konstruktoid/docker-1,moul/docker,laijs/moby,tophj-ibm/moby,moby/moby,x1022as/docker,q384566678/docker,konstruktoid/docker-upstream,mtrmac/docker,dgageot/docker,lixiaobing1/docker,lixiaobing1/docker,Mokolea/docker,mtrmac/docker,yongtang/docker,Syntaxide/docker,whuwxl/docker,rhatdan/docker,mixja/docker,laijs/docker,HideoYamauchi/docker,jlhawn/docker,moypray/docker,liaoqingwei/docker,diogomonica/docker,flavio/docker,pradipd/moby,kolyshkin/docker,KarthikNayak/docker,tklauser/docker,mahak/docker,ffoysal/docker,rancher/docker,rhatdan/docker,whuwxl/docker,konstruktoid/docker-1,paralin/docker,gschaetz/moby,dims/docker,gnailuy/docker,scotttlin/docker,jthelin/docker,mtrmac/docker,dccurtis/docker,AkihiroSuda/docker,dmcgowan/docker,harche/docker,thaJeztah/docker,fcrisciani/docker,nawawi/docker,POLJM242/docker,pradipd/moby,rancher/docker,sterchelen/docker,prertik/docker,jthelin/docker,jimjag/docker,nalind/docker,raja-sami-10p/moby,shishir-a412ed/docker,darrenstahlmsft/docker,madhanrm/docker,ripcurld0/moby,amatsus/docker,YuPengZTE/docker,haveatry/docker,paralin/docker,tophj-ibm/moby,sdurrheimer/docker,KingEmet/docker,noironetworks/docker,hqhq/moby,nawawi/docker,Mokolea/docker,harche/docker,qudongfang/docker,JMesser81/docker,trebonian/docker,tklauser/docker,rhatdan/docker,maxamillion/docker,shishir-a412ed/docker,laijs/moby,YuPengZTE/docker,moypray/docker,paralin/docker,erikh/docker,hqhq/moby,jvanz/docker,mkumatag/docker,xuxinkun/docker,pramodhkp/moby,imkin/moby