feature: create Font entity with types for filtering

src/entities/Font/index.ts

@@ -0,0 +1 @@
+export type { FontCategory, FontProvider, FontSubset } from './model/font';

src/entities/Font/model/font.ts

@@ -0,0 +1,14 @@
+/**
+ * Font category
+ */
+export type FontCategory = 'sans-serif' | 'serif' | 'display' | 'handwriting' | 'monospace';
+
+/**
+ * Font provider
+ */
+export type FontProvider = 'google' | 'fontshare';
+
+/**
+ * Font subset
+ */
+export type FontSubset = 'latin' | 'latin-ext' | 'cyrillic' | 'greek' | 'arabic' | 'devanagari';