feat(fonts): implement Phase 1 - Create Proxy API Client

- Created src/entities/Font/api/proxy/proxyFonts.ts
- Implemented fetchProxyFonts function with full pagination support
- Implemented fetchProxyFontById convenience function
- Added TypeScript interfaces: ProxyFontsParams, ProxyFontsResponse
- Added comprehensive JSDoc documentation
- Updated src/entities/Font/api/index.ts to export proxy API

Phase 1/7: Proxy API Integration for GlyphDiff

src/app/ui/Layout.svelte

@@ -41,7 +41,7 @@ let { children }: Props = $props();
     <header></header>
 
     <ScrollArea class="h-screen w-screen">
-        <main class="flex-1 w-full max-w-6xl mx-auto px-4 py-6 md:px-8 lg:py-10 relative">
+        <main class="flex-1 h-full w-full max-w-6xl mx-auto px-4 py-6 md:px-8 lg:py-10 relative">
             <TooltipProvider>
                 <TypographyMenu />
                 {@render children?.()}