feat(m0): scaffold Carbon Type foundation — React 19, ProseMirror (MIT), Vite 6

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [main, 'copilot/**']
+  pull_request:
+    branches: [main]
+
+jobs:
+  ci:
+    name: Lint, Build, Test
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Build
+        run: npm run build
+
+      - name: Test
+        run: npm test

.gitignore

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+# Dependencies
+node_modules/
+
+# Build output
+dist/
+build/
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea/
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# TypeScript build info
+*.tsbuildinfo
+
+# Coverage
+coverage/

.prettierrc

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+{
+  "singleQuote": true,
+  "semi": true,
+  "printWidth": 100,
+  "trailingComma": "es5"
+}

eslint.config.js

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+import tseslint from 'typescript-eslint';
+import reactHooks from 'eslint-plugin-react-hooks';
+import globals from 'globals';
+
+export default tseslint.config(
+  // Ignore build output and deps
+  { ignores: ['dist/**', 'node_modules/**'] },
+
+  // Apply typescript-eslint recommended to all TS/TSX files
+  ...tseslint.configs.recommended,
+
+  // Project-specific overrides for TS/TSX source
+  {
+    files: ['**/*.{ts,tsx}'],
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals.es2022,
+      },
+    },
+    plugins: {
+      'react-hooks': reactHooks,
+    },
+    rules: {
+      // React hooks correctness
+      'react-hooks/rules-of-hooks': 'error',
+      'react-hooks/exhaustive-deps': 'warn',
+
+      // TypeScript handles prop-types; disable the JS rule
+      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+    },
+  },
+);