* docs: add FileButton widget PRD
* feat: enhance FileButton widget with improved styling and functionality
* feat: remove 'SemiBold' option from FileButton widget configuration
* feat: add FileButton to base component properties and refactor styling logic
* Remove 'FileButton' from RevampedComponents list
* Delete docs/plans/2026-03-10-filebutton-widget-prd.md
* Update FileButton color properties to use new surface color variables
* feat: enhance FileButton styling and color computation logic
* fix: update IconX color to use computedLabelColor for better styling
* feat: add FileButton to NEW_WIDGETS and update content alignment to center
* Removed hover background color
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Co-authored-by: Shaurya Sharma <shaurya064@gmail.com>
