refactor: standardize code formatting across components and utilities

- Updated formatting in SiteFooter and SiteHeader components for consistency.
- Refactored Badge, Button, Card, Separator components to improve readability.
- Enhanced markdown parsing logic in announcements and markdown utility functions.
- Adjusted ESLint configuration for better code quality checks.
- Added biome.json for BiomeJS configuration.
- Updated package.json and configuration files for improved dependency management.

eslint.config.mjs

@@ -3,16 +3,16 @@ import nextVitals from "eslint-config-next/core-web-vitals";
 import nextTs from "eslint-config-next/typescript";
 
 const eslintConfig = defineConfig([
-  ...nextVitals,
-  ...nextTs,
-  // Override default ignores of eslint-config-next.
-  globalIgnores([
-    // Default ignores of eslint-config-next:
-    ".next/**",
-    "out/**",
-    "build/**",
-    "next-env.d.ts",
-  ]),
+	...nextVitals,
+	...nextTs,
+	// Override default ignores of eslint-config-next.
+	globalIgnores([
+		// Default ignores of eslint-config-next:
+		".next/**",
+		"out/**",
+		"build/**",
+		"next-env.d.ts",
+	]),
 ]);
 
 export default eslintConfig;