Init Astro site with Docker and AI workflows

- Add landing page and base layout with cozy theme
- Configure Astro, TypeScript, and project settings
- Add Dockerfile, Nginx config, and docker-compose
- Include favicon and site metadata
- Add documentation: README, DEVELOPMENT, PROJECT_CONTEXT, TODO, CLAUDE
- Add Gitea workflows for AI chat, PR review, issue triage, and codebase
  review

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "cozy-den",
+  "type": "module",
+  "version": "0.0.1",
+  "scripts": {
+    "dev": "astro dev",
+    "start": "astro dev",
+    "build": "astro check && astro build",
+    "preview": "astro preview",
+    "astro": "astro"
+  },
+  "dependencies": {
+    "astro": "^4.16.18"
+  }
+}