feat: Add execute-workflow action

execute-workflow/.gitignore

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+node_modules/
+.env

execute-workflow/.prettierrc

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+{
+  "semi": false,
+  "singleQuote": true,
+  "printWidth": 120
+}

execute-workflow/README.md

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+# Execute Workflow Action
+
+A GitHub Action for triggering workflows via `workflow_dispatch`, waiting for them to complete, and reporting their results.
+
+- Triggers workflows using the `workflow_dispatch` event
+- Waits for the workflow run to start (up to 60 seconds)
+- Polls the workflow run status until completion
+- Outputs the workflow run ID and conclusion
+- Fails the action if the triggered workflow doesn't succeed
+
+## Usage
+
+```yaml
+- name: Execute workflow
+  uses: ./execute-workflow
+  with:
+      workflow: my-workflow.yaml
+      inputs: '{ "key": "value" }'
+```
+
+## Inputs
+
+- `workflow` (required): Workflow filename relative to `.github/workflows` (e.g., `my-workflow.yaml`)
+- `inputs` (optional): Inputs to pass to the workflow as a JSON string
+- `token` (optional): GitHub token for authentication (defaults to `${{ github.token }}`)
+
+## Outputs
+
+- `workflowRunId`: The ID of the triggered workflow run
+- `conclusion`: The conclusion of the workflow run (`success`, `failure`, `cancelled`, etc.)

execute-workflow/action.yaml

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+name: 'Execute Workflow'
+description: 'Execute GitHub Actions workflows and wait for them to complete'
+
+inputs:
+  workflow:
+    description: "Workflow filename relative to .github/workflows (e.g., 'my-workflow.yaml')"
+    required: true
+  inputs:
+    description: 'Inputs to pass to the workflow, must be a JSON string'
+    required: false
+  token:
+    description: 'GitHub token for authentication'
+    required: false
+    default: ${{ github.token }}
+
+runs:
+  using: 'node20'
+  main: 'dist/index.js'