Retrieve comments from database tables, override, and output

[Envek]

Output database column comments as TS comments before fields.

Disabled by default. Enable it with:

Typelizer.configure do |c|
  c.comments = true
end

Given that ActiveRecord migration declares table column comment:

create_table :users do |t|
  t.string :login, null: false, comment: "User public @handle"
end

Output it as a comment before field typings in generated interface:

type AmsUserAuthor = {
  id: number;
  // Author login handle
  username: string | null;
  avatar: unknown;
}

typelize directive accepts comment option that overrides comment from the database or suppresses it if false is given.

typelize username: [:string, comment: "Username is username, that's it"]

Main use cases:

1. There is no comment in the database, no typelize directive: no comment
2. There is a comment in the database, no typelize directive: database comment used
3. There is no comment in the database, typelize directive has comment option: directive comment used
4. There is a comment in the database, typelize directive has comment option: directive comment used
5. There is a comment in the database, typelize directive has comment: false: no comment

NB: I couldn't make test for this as SQLite doesn't support comments for database objects.