feat: Switch to Material 3

[g123k]

Hi everyone,

The POC uses Material 3, so let's switch to it.
The text is a bit darker now, but I think that's OK.

[teolemon]

A material change

[teolemon]

@g123k the Golden are broken
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Improving_Page_Light_Theme (failed)
✅ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/pages/generic_lib/widgets/smooth_error_card_test.dart: SmoothErrorCard find error message
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Software development_Page_Light_Theme (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Translate_Page_Light_Theme (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Improving_Page_Dark_Theme (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Software development_Page_Dark_Theme (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Translate_Page_Dark_Theme (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Improving_Page_AMOLED_Theme (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Software development_Page_AMOLED_Theme (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/dialogs/generic_lib/dialogs_test.dart: Dialogs on Contribute Page looks as expected Translate_Page_AMOLED_Theme (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/pages/user_preferences_page_test.dart: UserPreferencesPage looks as expected Light (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/pages/user_preferences_page_test.dart: UserPreferencesPage looks as expected Dark (failed)
✅ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/widget_test.dart: Fake test
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/pages/user_preferences_page_test.dart: UserPreferencesPage looks as expected AMOLED (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/users/forgot_password_page_layout_test.dart: Password Reset Page looks as expected Light (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/users/forgot_password_page_layout_test.dart: Password Reset Page looks as expected Dark (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/users/forgot_password_page_layout_test.dart: Password Reset Page looks as expected AMOLED (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/users/signup_page_layout_test.dart: LoginPage looks as expected Light (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/users/signup_page_layout_test.dart: LoginPage looks as expected Dark (failed)
❌ /home/runner/work/smooth-app/smooth-app/packages/smooth_app/test/users/signup_page_layout_test.dart: LoginPage looks as expected AMOLED (failed)

[teolemon]

thanks, it passes @g123k , merging