Create new npm module for GTFS SQLjs

.eslintrc.json

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+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 2020,
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "rules": {
+    "@typescript-eslint/no-explicit-any": "warn",
+    "@typescript-eslint/explicit-module-boundary-types": "off"
+  },
+  "env": {
+    "node": true,
+    "browser": true,
+    "es2020": true
+  }
+}

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x, 21.x]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run linter
+        run: npm run lint
+
+      - name: Run type check
+        run: npm run typecheck
+
+      - name: Run tests
+        run: npm test
+
+      - name: Build package
+        run: npm run build
+
+      - name: Upload build artifacts
+        if: matrix.node-version == '20.x'
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+  publish:
+    needs: test
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build package
+        run: npm run build
+
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+      # Uncomment to enable automatic npm publishing
+      # - name: Publish to npm
+      #   if: startsWith(github.ref, 'refs/tags/v')
+      #   run: npm publish
+      #   env:
+      #     NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.gitignore

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+# Dependencies
+node_modules/
+
+# Build outputs
+dist/
+*.tsbuildinfo
+
+# Test coverage
+coverage/
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Temporary files
+*.tmp
+.cache/

.npmignore

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+# Source files
+src/
+tests/
+*.test.ts
+
+# Config files
+tsconfig.json
+tsup.config.ts
+vitest.config.ts
+.eslintrc.json
+
+# CI/CD
+.github/
+
+# Development
+node_modules/
+coverage/
+.vscode/
+.idea/
+
+# Git
+.git/
+.gitignore
+
+# Misc
+*.log
+.DS_Store