Fixes#30901
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## Summary by CodeRabbit
- **New Features**
- Enhanced feature flag checks to always enable specific features
without checking flag values.
- Introduced dynamic sizing for widget icons and thumbnails in the
editor, improving visual consistency.
- Implemented new styling for text input elements to better adapt to
various container sizes.
- Added unique identifiers to improve testability of the widget sidebar.
- Introduced new SVG properties for widget thumbnails and icons,
enriching widget customization options.
- **Refactor**
- Adjusted gap spacing in the widget sidebar for a more compact layout.
- **Style**
- Updated text input styling to use flexible width for improved layout
responsiveness.
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Co-authored-by: Pawan Kumar <pawankumar@Pawans-MacBook-Pro-2.local>
Co-authored-by: Valera Melnikov <valera@appsmith.com>
Fixes#30428
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **New Features**
- Introduced the `KeyValue` widget, enhancing the app's widget library
with key-value input functionality.
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