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.

app/sitemap.ts

@@ -5,42 +5,46 @@ import { getAllAnnouncements } from "@/lib/announcements";
 export const dynamic = "force-static";
 
 const SITE_URL =
-  process.env.NEXT_PUBLIC_SITE_URL ??
-  process.env.SITE_URL ??
-  "https://mc.neody.ad.jp";
+	process.env.NEXT_PUBLIC_SITE_URL ??
+	process.env.SITE_URL ??
+	"https://mc.neody.ad.jp";
 
 function toAbsoluteUrl(pathname: string): string {
-  return new URL(pathname, SITE_URL).toString();
+	return new URL(pathname, SITE_URL).toString();
 }
 
 export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
-  const announcements = await getAllAnnouncements();
+	const announcements = await getAllAnnouncements();
 
-  const staticRoutes: MetadataRoute.Sitemap = [
-    {
-      url: toAbsoluteUrl("/"),
-      lastModified: new Date(),
-      changeFrequency: "weekly",
-      priority: 1,
-    },
-    {
-      url: toAbsoluteUrl("/announcements/"),
-      lastModified: new Date(),
-      changeFrequency: "daily",
-      priority: 0.8,
-    },
-  ];
+	const staticRoutes: MetadataRoute.Sitemap = [
+		{
+			url: toAbsoluteUrl("/"),
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 1,
+		},
+		{
+			url: toAbsoluteUrl("/announcements/"),
+			lastModified: new Date(),
+			changeFrequency: "daily",
+			priority: 0.8,
+		},
+	];
 
-  const announcementRoutes: MetadataRoute.Sitemap = announcements.map((item) => {
-    const parsedDate = new Date(item.date);
+	const announcementRoutes: MetadataRoute.Sitemap = announcements.map(
+		(item) => {
+			const parsedDate = new Date(item.date);
 
-    return {
-      url: toAbsoluteUrl(`/announcements/${item.slug}/`),
-      lastModified: Number.isNaN(parsedDate.getTime()) ? new Date() : parsedDate,
-      changeFrequency: "monthly",
-      priority: 0.7,
-    };
-  });
+			return {
+				url: toAbsoluteUrl(`/announcements/${item.slug}/`),
+				lastModified: Number.isNaN(parsedDate.getTime())
+					? new Date()
+					: parsedDate,
+				changeFrequency: "monthly",
+				priority: 0.7,
+			};
+		},
+	);
 
-  return [...staticRoutes, ...announcementRoutes];
+	return [...staticRoutes, ...announcementRoutes];
 }