Fix support for pydantic > 2.10

[EnyMan]

Fixes #369 FastUI is broken with the new 2.10 Pydantic, and there are issues with circular import. This tries to fix that by refactoring the components part of the library.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 99.70501% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/python-fastui/fastui/components/containers.py	99.07%	1 Missing :warning:

:loudspeaker: Thoughts on this report? Let us know!