GHCi: Implement new `:show paths` sub-command
GHCi: Implement new `:show paths` sub-command

`:show paths` dumps the current working directory as well
as the current value of the `importPaths` dynamic flags field.

This addresses #8172

Signed-off-by: Herbert Valerio Riedel <202fbcf3c00694524024feb79f3bb8fc1c4e4f9c@gnu.org>

nushio3/ghc,ezyang/ghc,ml9951/ghc,fmthoma/ghc,AlexanderPankiv/ghc,bitemyapp/ghc,hferreiro/replay,gcampax/ghc,da-x/ghc,green-haskell/ghc,oldmanmike/ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,ekmett/ghc,lukexi/ghc,ghc-android/ghc,nathyong/microghc-ghc,mettekou/ghc,ghc-android/ghc,GaloisInc/halvm-ghc,ekmett/ghc,fmthoma/ghc,olsner/ghc,lukexi/ghc-7.8-arm64,sgillespie/ghc,vTurbine/ghc,TomMD/ghc,nathyong/microghc-ghc,TomMD/ghc,tibbe/ghc,tjakway/ghcjvm,lukexi/ghc-7.8-arm64,forked-upstream-packages-for-ghcjs/ghc,spacekitteh/smcghc,shlevy/ghc,frantisekfarka/ghc-dsi,mcschroeder/ghc,tjakway/ghcjvm,AlexanderPankiv/ghc,acowley/ghc,urbanslug/ghc,ml9951/ghc,TomMD/ghc,sgillespie/ghc,christiaanb/ghc,holzensp/ghc,wxwxwwxxx/ghc,green-haskell/ghc,forked-upstream-packages-for-ghcjs/ghc,ezyang/ghc,vikraman/ghc,spacekitteh/smcghc,wxwxwwxxx/ghc,ryantm/ghc,gcampax/ghc,frantisekfarka/ghc-dsi,lukexi/ghc,holzensp/ghc,GaloisInc/halvm-ghc,gcampax/ghc,AlexanderPankiv/ghc,urbanslug/ghc,AlexanderPankiv/ghc,wxwxwwxxx/ghc,wxwxwwxxx/ghc,fmthoma/ghc,vikraman/ghc,ekmett/ghc,ryantm/ghc,elieux/ghc,olsner/ghc,tjakway/ghcjvm,nkaretnikov/ghc,snoyberg/ghc,tjakway/ghcjvm,snoyberg/ghc,shlevy/ghc,vTurbine/ghc,TomMD/ghc,sdiehl/ghc,acowley/ghc,mettekou/ghc,olsner/ghc,acowley/ghc,gcampax/ghc,snoyberg/ghc,nushio3/ghc,holzensp/ghc,jstolarek/ghc,ryantm/ghc,siddhanathan/ghc,mettekou/ghc,da-x/ghc,jstolarek/ghc,nkaretnikov/ghc,gridaphobe/ghc,ryantm/ghc,acowley/ghc,vikraman/ghc,shlevy/ghc,wxwxwwxxx/ghc,fmthoma/ghc,snoyberg/ghc,nushio3/ghc,green-haskell/ghc,anton-dessiatov/ghc,shlevy/ghc,da-x/ghc,gridaphobe/ghc,GaloisInc/halvm-ghc,ml9951/ghc,mfine/ghc,forked-upstream-packages-for-ghcjs/ghc,bitemyapp/ghc,mettekou/ghc,oldmanmike/ghc,shlevy/ghc,nathyong/microghc-ghc,da-x/ghc,nkaretnikov/ghc,christiaanb/ghc,ml9951/ghc,GaloisInc/halvm-ghc,sgillespie/ghc,mfine/ghc,christiaanb/ghc,siddhanathan/ghc,ekmett/ghc,vikraman/ghc,wxwxwwxxx/ghc,AlexanderPankiv/ghc,ml9951/ghc,acowley/ghc,anton-dessiatov/ghc,mcschroeder/ghc,mcschroeder/ghc,gridaphobe/ghc,TomMD/ghc,da-x/ghc,urbanslug/ghc,gridaphobe/ghc,mettekou/ghc,oldmanmike/ghc,siddhanathan/ghc,oldmanmike/ghc,urbanslug/ghc,olsner/ghc,spacekitteh/smcghc,sdiehl/ghc,elieux/ghc,forked-upstream-packages-for-ghcjs/ghc,siddhanathan/ghc,ml9951/ghc,ml9951/ghc,oldmanmike/ghc,anton-dessiatov/ghc,siddhanathan/ghc,jstolarek/ghc,elieux/ghc,vikraman/ghc,hferreiro/replay,ghc-android/ghc,tibbe/ghc,sgillespie/ghc,holzensp/ghc,ryantm/ghc,siddhanathan/ghc,vTurbine/ghc,gcampax/ghc,AlexanderPankiv/ghc,nushio3/ghc,mfine/ghc,nushio3/ghc,gcampax/ghc,hferreiro/replay,sdiehl/ghc,frantisekfarka/ghc-dsi,mcschroeder/ghc,shlevy/ghc,elieux/ghc,christiaanb/ghc,gridaphobe/ghc,lukexi/ghc,wxwxwwxxx/ghc,tjakway/ghcjvm,olsner/ghc,holzensp/ghc,snoyberg/ghc,acowley/ghc,sdiehl/ghc,ekmett/ghc,forked-upstream-packages-for-ghcjs/ghc,hferreiro/replay,sgillespie/ghc,mcschroeder/ghc,mfine/ghc,urbanslug/ghc,anton-dessiatov/ghc,mfine/ghc,lukexi/ghc-7.8-arm64,urbanslug/ghc,frantisekfarka/ghc-dsi,frantisekfarka/ghc-dsi,forked-upstream-packages-for-ghcjs/ghc,mcschroeder/ghc,anton-dessiatov/ghc,nathyong/microghc-ghc,ghc-android/ghc,ml9951/ghc,mfine/ghc,vikraman/ghc,gridaphobe/ghc,mettekou/ghc,elieux/ghc,nushio3/ghc,hferreiro/replay,lukexi/ghc,bitemyapp/ghc,mettekou/ghc,elieux/ghc,christiaanb/ghc,hferreiro/replay,ghc-android/ghc,anton-dessiatov/ghc,da-x/ghc,christiaanb/ghc,lukexi/ghc-7.8-arm64,ezyang/ghc,nkaretnikov/ghc,vTurbine/ghc,bitemyapp/ghc,sdiehl/ghc,tibbe/ghc,vikraman/ghc,ezyang/ghc,gcampax/ghc,ezyang/ghc,nkaretnikov/ghc,tibbe/ghc,nushio3/ghc,mcschroeder/ghc,gridaphobe/ghc,lukexi/ghc,vTurbine/ghc,olsner/ghc,sgillespie/ghc,jstolarek/ghc,nkaretnikov/ghc,nathyong/microghc-ghc,ezyang/ghc,tibbe/ghc,elieux/ghc,da-x/ghc,vTurbine/ghc,ezyang/ghc,lukexi/ghc-7.8-arm64,tjakway/ghcjvm,jstolarek/ghc,hferreiro/replay,vTurbine/ghc,christiaanb/ghc,TomMD/ghc,sgillespie/ghc,fmthoma/ghc,ghc-android/ghc,nkaretnikov/ghc,fmthoma/ghc,fmthoma/ghc,snoyberg/ghc,nathyong/microghc-ghc,spacekitteh/smcghc,TomMD/ghc,tjakway/ghcjvm,forked-upstream-packages-for-ghcjs/ghc,urbanslug/ghc,green-haskell/ghc,ghc-android/ghc,olsner/ghc,acowley/ghc,oldmanmike/ghc,shlevy/ghc,GaloisInc/halvm-ghc,bitemyapp/ghc,mfine/ghc,siddhanathan/ghc,green-haskell/ghc,anton-dessiatov/ghc,oldmanmike/ghc,spacekitteh/smcghc,AlexanderPankiv/ghc,sdiehl/ghc,sdiehl/ghc,nathyong/microghc-ghc,snoyberg/ghc