fix: resolve Prettier markdown code block parsing errors

- Fix syntax errors in skills markdown files (.github/skills, .opencode/skills)
- Change typescript to tsx for code blocks with JSX
- Replace ellipsis (...) in array examples with valid syntax
- Separate CSS from TypeScript into distinct code blocks
- Convert JavaScript object examples to valid JSON in docs
- Fix enum definitions with proper comma separation

package.json

@@ -33,6 +33,7 @@
     "lint:md:fix": "markdownlint-cli2  --fix \"**/*.md\" \"!.trunk/**\" \"!.venv/**\" \"!node_modules/**\""
   },
   "dependencies": {
+    "@neondatabase/auth": "^0.1.0-beta.21",
     "@prisma/adapter-pg": "^6.19.2",
     "@prisma/client": "^6.19.2",
     "@radix-ui/react-accordion": "^1.2.12",
@@ -76,7 +77,6 @@
     "lucide-react": "^0.525.0",
     "motion": "^12.27.1",
     "next": "^16.1.4",
-    "next-auth": "^4.24.13",
     "next-themes": "^0.4.6",
     "node-cron": "^4.2.1",
     "node-fetch": "^3.3.2",