refactor(font): consolidate all types into single types.ts file

- Created unified model/types.ts with all type definitions
- Consolidated domain types (FontCategory, FontProvider, FontSubset)
- Consolidated Google Fonts API types (FontItem, GoogleFontsApiModel, etc.)
- Consolidated Fontshare API types (FontshareFont, FontshareStyle, etc.)
- Consolidated normalization types (UnifiedFont, FontStyleUrls, etc.)
- Consolidated store types (FontCollectionStore, FontCollectionFilters, etc.)
- Removed duplicate type files (font.ts, google_fonts.ts, fontshare_fonts.ts)
- Updated all imports to use consolidated types
- Updated normalize module to import from /Font
- Updated API clients to re-export types for backward compatibility
- Updated store to use centralized types
- Updated Font index.ts to export all types

Benefits:
- Centralized type definitions in single location
- Cleaner imports (single import from /Font)
- Better code organization with clear sections
- Follows FSD principles (types in model layer)
- No duplicate type definitions

src/entities/Font/api/fontshare/fontshare.ts

@@ -43,11 +43,9 @@ export interface FontshareParams extends QueryParams {
 
 /**
  * Fontshare API response wrapper
- * Extends collection model with additional metadata
+ * Re-exported from model/types for backward compatibility
  */
-export interface FontshareResponse extends FontshareApiModel {
-    // Response structure matches FontshareApiModel
-}
+export type FontshareResponse = FontshareApiModel;
 
 /**
  * Fetch fonts from Fontshare API