docs(config): add deploy command, update README and CLAUDE.md

Adds bun run deploy script, deployment docs to README, and updates
CLAUDE.md with deployment info, current patterns, and rule to keep
docs in sync with changes.

package.json

@@ -12,6 +12,7 @@
         "format": "biome format --write .",
         "format:check": "biome format .",
         "commit": "cz",
+        "deploy": "astro build && wrangler pages deploy",
         "prepare": "lefthook install"
     },
     "dependencies": {