Move packages around to use as library

[InTheCloudDan]

• Move coderefs out of pkg directory which is legacy and remove pkg
• alias and search moved from Internal
• Make generateAliases a public function

There is additional work that could be done to decouple code references further but this is a first step.

For my use case search may not need to be moved but it already has public methods.

If the change proposed looks reasonable then the following is a TODO:

• Add documentation around using as a library.

[vlymar]

Hey @InTheCloudDan, thanks for the heavy lifting here!

Move coderefs out of pkg directory which is legacy and remove pkg

Can you share more about pkg being legacy? I believe we followed the patterns in https://github.com/golang-standards/project-layout for this project but could see that being outdated now.

[InTheCloudDan]

@vlymar it looks like this issue is still open on it: golang-standards/project-layout#10

They do reference this tweet from Brad Fitzpatrick though about it being legacy: https://twitter.com/bradfitz/status/1039512487538970624

[vlymar]

Sorry this review took so long! Thanks for linking that github issues thread, interesting stuff.

[yusinto]

Apologies for the slowness, I have no excuses. Looks good to me, thank you for doing this.