[FEATURE] Migrate UI Components from `collaction_app`

[Xazin]

Description:
We want to migrate some of the most common UI Components from collaction_app.

Each successful migration of a Widget should include:

• Widgetbook use-case inside collaction_book package
• Unit tests

Additionally some rules/notes for when migrating widgets:

1. Do NOT use/include state management, eg. Riverpod or BLoC. All Widgets should be decoupled, if they previously relied on a domain model (eg. CrowdAction or Commitment) then create a ViewModel for the Widget, or simply use only required fields.
2. At least 85% Test Coverage on ALL files added!
3. Use Theme for colors!
4. Abstract all onTap or similar functions into fields and callbacks!

Widgets to be Migrated:

• AccentChip + SecondaryChip (Consider if they can be consolidated)
• ContentPlaceholder
• CountryIcon
• CustomFAB (Consider renaming to eg. CAFab)
• MicroLock
• CollAction Icons
• PhotoSelector
• PillButton
• CommitmentCard
• CustomAppBar
• PinTextField
• PinInput

There may be more widgets, feel free to comment below if you think something is a candiate!