Rename project from Gooti to Plebian Signer and add Claude Code config

- Rename all gooti-* files to plebian-signer-* across Chrome and Firefox
- Rename GootiMetaHandler to SignerMetaHandler in common library
- Update all references to use new naming convention
- Add CLAUDE.md with project build/architecture documentation
- Add Claude Code release command tailored for this npm/Angular project
- Add NWC-IMPLEMENTATION.md design document
- Add Claude skills for nostr, typescript, react, svelte, and applesauce libs
- Update README and various component templates with new branding

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

projects/firefox/tsconfig.app.json

@@ -9,8 +9,8 @@
   "files": [
     "src/main.ts",
     "src/background.ts",
-    "src/gooti-extension.ts",
-    "src/gooti-content-script.ts",
+    "src/plebian-signer-extension.ts",
+    "src/plebian-signer-content-script.ts",
     "src/prompt.ts",
     "src/options.ts"
   ],