Add GitHub Action to upload package versions

Author: jonrohan

.github/actions/upload-versions/action.yml

@@ -0,0 +1,44 @@
+name: 'Upload Versions'
+description: 'Upload version information for public packages'
+runs:
+  using: 'composite'
+  steps:
+    - name: Set up Node.js
+      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
+      with:
+        node-version: 22
+    - name: Install glob package
+      shell: bash
+      run: npm install glob --no-package-lock
+    - name: Write workspace versions as JSON file
+      uses: actions/github-script@a3e7071a34d7e1f219a8a4de9a5e0a34d1ee1293
+      with:
+        script: |
+          const fs = require('node:fs');
+          const {globSync} = require('glob')
+
+          const packageJsonPaths = globSync('**/package.json', { ignore: ['**/node_modules/**'] })
+          const output = {
+            packages: [],
+          };
+
+          for (const packageJsonPath of packageJsonPaths) {
+            const contents = fs.readFileSync(packageJsonPath, 'utf8');
+            const packageJson = JSON.parse(contents);
+            if (packageJson.private) {
+              continue;
+            }
+
+            const pkg = {
+              name: packageJson.name,
+              version: packageJson.version,
+            };
+            output.packages.push(pkg);
+          }
+
+          fs.writeFileSync('versions.json', JSON.stringify(output, null, 2));
+    - name: Upload version file
+      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
+      with:
+        name: versions
+        path: versions.json