[MCORE-185] Update talkback for the input component

[lisandra-santos]

Description

• Add an announcement to the character count and update accessibility label

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• 🎨 Style/UI change (visual changes to components)
• ♻️ Code refactoring (no functional changes)
• ⚡ Performance improvement

Backward Compatibility

• This change is backward compatible
• This change includes deprecations (with @Deprecated annotation and migration guidance)
• This change includes breaking changes (requires major version bump)

If breaking changes or deprecations, please explain:

Changes Made

• Add an announcement to the character count
• Update accessibility label
• Fix: Apply the modifier provided via a component parameter

Screenshots / Videos

N/A

Testing

• Tested in the companion app
• Tested in light and dark themes
• Tested with different screen sizes/orientations
• Verified existing functionality still works

Test details:

Documentation

• Updated KDoc comments with usage examples
• Updated README if needed
• Added preview composables for new components

Checklist

• My code follows the project's code style (ran ./gradlew spotlessApply)
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added usage examples for new public APIs
• Any dependent changes have been merged and published

Additional Notes