Feat/vercel showcases (#17)

* feat: migrate examples to showcases and setup Vercel deployment

- Rename /examples directory to /showcases
- Update package names to showcases-*
- Update pnpm-workspace configuration
- Add Vercel configuration for docs and showcases
- Update React showcase branding and meta tags
- Configure separate builds for schepta.org and show.schepta.org

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

* fix: correct Vercel output directories and add install commands

- Fix docs output directory to .vitepress/dist (VitePress default)
- Fix showcases output directory to react/dist
- Add explicit installCommand for both configurations

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

* fix pnpm-lock

* fix: simplify Vercel showcases configuration

- Add package.json to showcases directory for Vercel detection
- Use simpler build command that copies files to showcases root
- Set output directory to current directory

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

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: guynikan

showcases/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "schepta-showcases",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "build": "cd .. && pnpm install && pnpm build --filter='./packages/*' && pnpm --filter showcases-react build && cp -r showcases/react/dist/* showcases/",
+    "dev": "cd react && pnpm dev"
+  },
+  "devDependencies": {
+    "vite": "^5.0.8"
+  }
+}