Add Template Selection for Enhancement, New Sparkle Icon Variations, and Floating Button UI Improvements

[ComputelessComputer]

• Added three new variations of the sparkle icon with different elements and layouts to provide more options for the application's visual design and branding.
• Implemented the ability to select a template when enhancing content in the editor area, allowing users to choose a specific template for the enhancement process.
• Updated the floating button component to include a popover with a list of available templates, enabling users to select a template before triggering the enhancement process.
• Added a "Switch to Enhanced" button in the popover to quickly switch back to the enhanced view.
• Improved the UI of the floating button by adding a shadow, rounded corners, and a sparkling icon animation.
• Added "Auto Enhance" translation to Korean and English.