feat: initial monorepo setup with Turborepo, Next.js 16, and .ts-only components

- Set up Turborepo monorepo with pnpm workspaces
- Configure shared configs (Biome, ESLint, Tailwind, TypeScript)
- Create @tpmjs/ui package with .ts-only React components (Button, Card)
- Create @tpmjs/utils package with utility functions
- Create @tpmjs/types package with Zod schemas
- Create @tpmjs/env package for environment validation
- Set up Next.js 16 App Router application
- Configure Storybook in separate package
- Add GitHub Actions CI/CD workflows
- Configure Changesets for versioning and publishing
- Set up Lefthook pre-commit hooks
- Add comprehensive documentation

Key architecture decisions:
- All React components use .ts extension with createElement (no JSX)
- No barrel exports (index.ts) - direct imports required
- Module boundaries enforced via ESLint
- tsup for package builds with ESM + types
- Tailwind CSS with shared design tokens

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

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

packages/storybook/styles/globals.css

@@ -0,0 +1,26 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@layer base {
+  :root {
+    --background: 0 0% 100%;
+    --foreground: 222.2 84% 4.9%;
+    --card: 0 0% 100%;
+    --card-foreground: 222.2 84% 4.9%;
+    --primary: 222.2 47.4% 11.2%;
+    --primary-foreground: 210 40% 98%;
+    --secondary: 210 40% 96.1%;
+    --secondary-foreground: 222.2 47.4% 11.2%;
+    --muted: 210 40% 96.1%;
+    --muted-foreground: 215.4 16.3% 46.9%;
+    --accent: 210 40% 96.1%;
+    --accent-foreground: 222.2 47.4% 11.2%;
+    --destructive: 0 84.2% 60.2%;
+    --destructive-foreground: 210 40% 98%;
+    --border: 214.3 31.8% 91.4%;
+    --input: 214.3 31.8% 91.4%;
+    --ring: 222.2 84% 4.9%;
+    --radius: 0.5rem;
+  }
+}