feat: Separate interfaces into dedicated files and folder

[taj54]

This PR refactors the project structure by moving TypeScript interfaces into their own dedicated folder and files.

✅ Changes Made

• Created a new interfaces/ directory to house all interface definitions.
• Split existing inline/interface declarations into individual files.
• Updated import paths across the codebase to reference the new location.
• Improved consistency and readability of type definitions.

🎯 Motivation

• Enhances maintainability by centralizing all interfaces.
• Makes it easier to extend and reuse interfaces across modules.
• Improves overall project structure and scalability.

🔍 Testing

• Verified that all imports are updated and application builds successfully.
• No breaking changes introduced.

[taj54]

Just made some changes, @softprops Mind checking them out?

[chenrui333]

what is this for?