feat: add npm package + GitHub Pages demo site

- Package entry (index.ts): exports frameLoopManager, useFrameLoop,
  useFrameLoopManager only — components are demo-only
- package.json: scoped name @tuomashatakka/canvas-loop-framecapper,
  peerDeps, exports map, publishConfig → GitHub npm registry
- vite.lib.config.ts: ESM + CJS library build with rolled-up .d.ts
- tsconfig.lib.json: scoped to lib/ for clean declaration generation
- .npmrc: maps @tuomashatakka scope to npm.pkg.github.com
- App.tsx: rewritten as docs landing page with live demo modal
- vite.config.ts: base path support for GitHub Pages
- .github/workflows/publish.yml: publishes on v* tag or workflow_dispatch
- .github/workflows/pages.yml: deploys demo to GitHub Pages on main push
- CLAUDE.md: comprehensive codebase documentation

Author: tuomashatakka

.github/workflows/pages.yml

@@ -29,7 +29,7 @@ jobs:
           node-version: '20'
 
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: Build demo app
         run: npm run build

.github/workflows/publish.yml

@@ -22,7 +22,7 @@ jobs:
           scope: '@tuomashatakka'
 
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: Publish
         run: npm publish --access public

package.json

@@ -16,7 +16,7 @@
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "https://github.com/tuomashatakka/canvas-loop-framecapper.git"
+    "url": "git+https://github.com/tuomashatakka/canvas-loop-framecapper.git"
   },
   "type": "module",
   "main": "./dist/index.cjs",