Setup for bun

.github/workflows/bun-build.yml

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+name: Generate standalone Bun executable
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-push-release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+      - run: bun install
+      - run: bun run test
+      - run: bun run build
+      - uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            substreams-sink-prometheus

.github/workflows/bun-test.yml

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+name: Bun Test
+
+on: push
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+      - run: bun install
+      - run: bun run test