refactor(ci): use .node-version instead of external-tools.json

Remove build-infra/external-tools.json dependency from workflows.
Use .node-version file and packageManager field from package.json
for tool versions instead.

- ci.yml: Read Node.js version from .node-version
- publish-socketbin.yml: Use node-version-file and pnpm/action-setup
- Remove packages/build-infra/external-tools.json (obsolete)

The build-infra package is retained for its esbuild plugins and
utilities which are still used by the build system.

Author: jdalton

.github/workflows/ci.yml

@@ -25,8 +25,8 @@ on:
         description: 'Node.js versions to test (JSON array)'
         required: false
         type: string
-        # Default should match packages/build-infra/external-tools.json -> node.recommendedVersion.
-        default: '["24.10.0"]'
+        # Default should match .node-version file.
+        default: '["24"]'
 
 permissions:
   contents: read
@@ -41,21 +41,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
-      - name: Setup Node.js
-        uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
-        with:
-          node-version-file: .node-version
-
-      - name: Setup pnpm
-        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
-
-      - name: Install dependencies
-        run: pnpm install --frozen-lockfile
-
-      - name: Load Node.js version from external-tools.json
+      - name: Load Node.js version from .node-version
         id: versions
         run: |
-          NODE_VERSION=$(jq -r '.node.recommendedVersion' packages/build-infra/external-tools.json)
+          NODE_VERSION=$(cat .node-version)
           echo "node=[\"$NODE_VERSION\"]" >> $GITHUB_OUTPUT
           echo "Loaded Node.js: $NODE_VERSION"
 

.github/workflows/publish-socketbin.yml

@@ -122,25 +122,14 @@ jobs:
           autocrlf: false
           persist-credentials: false
 
-      - name: Load tool versions
-        id: tools
-        run: |
-          # Load versions from packages/build-infra/external-tools.json
-          NODE_VERSION=$(jq -r '.node.recommendedVersion' packages/build-infra/external-tools.json)
-          PNPM_VERSION=$(jq -r '.pnpm.recommendedVersion' packages/build-infra/external-tools.json)
-          echo "node-version=$NODE_VERSION" >> $GITHUB_OUTPUT
-          echo "pnpm-version=$PNPM_VERSION" >> $GITHUB_OUTPUT
-
       - name: Setup Node.js
         uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
         with:
-          node-version: ${{ steps.tools.outputs.node-version }}
+          node-version-file: .node-version
           registry-url: 'https://registry.npmjs.org'
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
-        with:
-          version: ${{ steps.tools.outputs.pnpm-version }}
+        uses: pnpm/action-setup@fe02b34f77f8bc703788d5817da081398fad5dd2 # v4.0.0
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
@@ -354,25 +343,14 @@ jobs:
           autocrlf: false
           persist-credentials: false
 
-      - name: Load tool versions
-        id: tools
-        run: |
-          # Load versions from packages/build-infra/external-tools.json
-          NODE_VERSION=$(jq -r '.node.recommendedVersion' packages/build-infra/external-tools.json)
-          PNPM_VERSION=$(jq -r '.pnpm.recommendedVersion' packages/build-infra/external-tools.json)
-          echo "node-version=$NODE_VERSION" >> $GITHUB_OUTPUT
-          echo "pnpm-version=$PNPM_VERSION" >> $GITHUB_OUTPUT
-
       - name: Setup Node.js
         uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
         with:
-          node-version: ${{ steps.tools.outputs.node-version }}
+          node-version-file: .node-version
           registry-url: 'https://registry.npmjs.org'
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
-        with:
-          version: ${{ steps.tools.outputs.pnpm-version }}
+        uses: pnpm/action-setup@fe02b34f77f8bc703788d5817da081398fad5dd2 # v4.0.0
 
       - name: Install latest npm
         run: npm install -g npm@latest