Add support for citext

[krhubert]

I think citext is such a common extension that it is worth supporting it out of the box. What do you think?

go run ariga.io/entimport/cmd/entimport -dsn 'postgresql://postgres:postgres@localhost:5432/postgres?sslmode=disable'
2022/03/23 10:22:11 entimport: schema import failed - entimport: unsupported type &{<nil> "citext"}
exit status 1

[zeevmoney]

Hi @krhubert, thanks for reaching out!

This issue is related to the entimport repo, I'm transferring it.
Next tasks in entimport will be adding support for more field types, but I can't estimate it currently.
If you want to contribute, you are more than welcome, and if you need guidance you can join our Discord and we will be happy to help.