README: add GoDoc link
README: add GoDoc link

There is still a lot missing from the documentation, but what is there
might be useful for someone wanting to read the code from a browser
similar to lxr.

Signed-off-by: Alexander Alemayhu <e46fc836cca3acec03944314d1457c2ae6c68ef3@alemayhu.com>

tklauser/cilium,gumpt/cilium,gumpt/cilium,eloycoto/cilium,eloycoto/cilium,eloycoto/cilium,cilium-team/cilium,eloycoto/cilium,michi-covalent/cilium,tgraf/cilium,mskarbek/cilium,cilium/cilium,gumpt/cilium,cilium/cilium,mskarbek/cilium,mskarbek/cilium,cilium-team/cilium,gumpt/cilium,scanf/cilium,eloycoto/cilium,tklauser/cilium,tgraf/cilium,scanf/cilium,michi-covalent/cilium,eloycoto/cilium,cilium/cilium,scanf/cilium,gumpt/cilium,michi-covalent/cilium,tklauser/cilium,cilium/cilium,gumpt/cilium,tklauser/cilium,tgraf/cilium,scanf/cilium,tgraf/cilium,cilium/cilium,tgraf/cilium,scanf/cilium,tgraf/cilium,michi-covalent/cilium,michi-covalent/cilium,mskarbek/cilium,eloycoto/cilium,mskarbek/cilium,scanf/cilium,scanf/cilium,mskarbek/cilium,tklauser/cilium,gumpt/cilium