add markdown formatting with code support

package.json

@@ -28,6 +28,7 @@
 		"@sveltejs/enhanced-img": "^0.11.0",
 		"@sveltejs/kit": "^2.70.3",
 		"@sveltejs/vite-plugin-svelte": "^7.3.0",
+		"@tailwindcss/typography": "^0.5.20",
 		"@tailwindcss/vite": "^4.3.3",
 		"@types/eslint": "9.6.1",
 		"@types/pg": "^8.23.1",
@@ -64,6 +65,9 @@
 		"@sveltejs/adapter-node": "^5.5.7",
 		"ai": "^7.0.85",
 		"drizzle-orm": "^1.0.0-rc.4",
+		"highlight.js": "^11.12.0",
+		"marked": "^18.0.11",
+		"marked-highlight": "^2.2.4",
 		"mode-watcher": "^1.1.0",
 		"postgres": "^3.4.9",
 		"zod": "^4.5.4"