feat: Bun Runtime Support. Migrate from Piscina to Tinypool for worker thread management

.github/workflows/ci.yml

@@ -133,6 +133,24 @@ jobs:
         env:
           CI_OS: ${{ runner.os }}
 
+  test-bun:
+    name: Test with Bun
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        bun-version: [latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # ratchet:actions/checkout@v4
+      - name: Setup Bun ${{ matrix.bun-version }}
+        uses: oven-sh/setup-bun@735343b667d3e6f658f44d0eca948eb6282f2b76 # ratchet:oven-sh/setup-bun@v2
+        with:
+          bun-version: ${{ matrix.bun-version }}
+      - run: bun install
+      - run: bun run test
+        env:
+          CI_OS: ${{ runner.os }}
+
   test-coverage:
     name: Test coverage
     runs-on: ubuntu-latest
@@ -200,3 +218,29 @@ jobs:
         with:
           name: repomix-output-${{ matrix.os }}-${{ matrix.node-version }}.txt
           path: repomix-output.txt
+
+  build-and-run-bun:
+    name: Build and run with Bun
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        bun-version: [latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # ratchet:actions/checkout@v4
+      - name: Setup Bun ${{ matrix.bun-version }}
+        uses: oven-sh/setup-bun@735343b667d3e6f658f44d0eca948eb6282f2b76 # ratchet:oven-sh/setup-bun@v2
+        with:
+          bun-version: ${{ matrix.bun-version }}
+      - run: bun install
+      - run: bun run build
+      - name: Install only production dependencies
+        run: bun install --production
+      - run: bun bin/repomix.cjs
+      - run: bun bin/repomix.cjs --version
+      - run: bun bin/repomix.cjs --help
+      - name: Upload build artifact
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # ratchet:actions/upload-artifact@v4
+        with:
+          name: repomix-output-bun-${{ matrix.os }}-${{ matrix.bun-version }}.txt
+          path: repomix-output.txt