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/index.ts

@@ -23,31 +23,38 @@ export {
     normalizeGoogleFonts,
 } from './api/normalize';
 export type {
-    FontFeatures,
-    FontMetadata,
-    FontStyleUrls,
-    UnifiedFont,
-    UnifiedFontVariant,
-} from './api/normalize';
-export type {
+    // Domain types
     FontCategory,
+    FontCollectionFilters,
+    FontCollectionSort,
+    // Store types
+    FontCollectionState,
+    FontCollectionStore,
+    FontFeatures,
+    FontFiles,
+    FontItem,
+    FontMetadata,
     FontProvider,
-    FontSubset,
-} from './model/types/font';
-export type {
+    // Fontshare API types
     FontshareApiModel,
+    FontshareAxis,
     FontshareDesigner,
     FontshareFeature,
     FontshareFont,
+    FontshareLink,
     FontsharePublisher,
     FontshareStyle,
     FontshareStyleProperties,
     FontshareTag,
     FontshareWeight,
-} from './model/types/fontshare_fonts';
-export type {
-    FontFiles,
-    FontItem,
+    FontStyleUrls,
+    FontSubset,
     FontVariant,
+    FontWeight,
+    FontWeightItalic,
+    // Google Fonts API types
     GoogleFontsApiModel,
-} from './model/types/google_fonts';
+    // Normalization types
+    UnifiedFont,
+    UnifiedFontVariant,
+} from './model/types';