feat: add font family configuration system with monospace option

scripts/configure-fork.ts

@@ -72,6 +72,7 @@ interface ForkConfig {
   featuredViewMode?: "cards" | "list";
   showViewToggle?: boolean;
   theme?: "dark" | "light" | "tan" | "cloud";
+  fontFamily?: "serif" | "sans" | "monospace";
 }
 
 // Get project root directory
@@ -252,6 +253,14 @@ function updateSiteConfig(config: ForkConfig): void {
     );
   }
 
+  // Update fontFamily if specified
+  if (config.fontFamily) {
+    content = content.replace(
+      /fontFamily: ['"](?:serif|sans|monospace)['"],\s*\/\/ Options: "serif", "sans", or "monospace"/,
+      `fontFamily: "${config.fontFamily}", // Options: "serif", "sans", or "monospace"`,
+    );
+  }
+
   // Update gitHubRepo config (for AI service raw URLs)
   // Support both new gitHubRepoConfig and legacy githubUsername/githubRepo fields
   const gitHubRepoOwner =