feat: merge wait-for into the main library

[Catalyst4222]

About

This pull request merges the wait-for ext into the main library
The ext will be depreciated once the pr is merged

Checklist

• The pre-commit code linter has been run over all edited files to ensure the code is linted.
• I've ensured the change(s) work on 3.8.6 and higher.

I've made this pull request: (check all that apply)

• For the documentation
• To add a new feature
• As a general enhancement
• As a refactor of the library/the library's code
• To fix an existing bug
• To resolve #ISSUENUMBER

This is:

• A breaking change

[mAxYoLo01]

To take into account PR #1112 and avoid future conflicts

[EepyElvyra]

Maybe make it shorter a bit?

[Catalyst4222]

@EdVraz Due to the inconsistency of the length of the return values, along with the difficulty of conveying that to the user, I've changed wait_for_modal to return a tuple of the context with a list of the field values