Add download artifacts action

Author: sjohnr

.github/actions/get-workflow-run-id/README.md

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+# Get Workflow Run ID
+
+Get the ID of the latest successful workflow run.
+
+Accepts the following inputs:
+
+* `repository` (Required) - The repository owner and name (e.g. `spring-projects/spring-security`).
+* `workflow-id` (Required) - The ID of the workflow or the workflow file name.
+
+Produces the following output:
+
+* `run-id` - The ID of the latest successful workflow run.
+
+## Installation
+
+```yaml
+- id: get-workflow-run-id
+  name: Get Workflow Run ID
+  uses: spring-io/spring-security-release-tools/.github/actions/get-workflow-run-id@v1
+  with:
+    repository: owner/repo
+    workflow-id: build-and-deploy.yml
+```
+
+## Example Usage
+
+```yaml
+name: Download Artifacts
+
+on: push
+
+permissions:
+  actions: read
+
+jobs:
+  download-artifacts:
+    name: Download Artifacts
+    runs-on: ubuntu-latest
+    steps:
+      - id: get-workflow-run-id
+        name: Get Workflow Run ID
+        uses: spring-io/spring-security-release-tools/.github/actions/get-workflow-run-id@v1
+        with:
+          repository: spring-projects/spring-security
+          workflow-id: continuous-integration-workflow.yml
+      - name: Download Artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: maven-repository
+          path: build
+          repository: spring-projects/spring-security
+          github-token: ${{ github.token }}
+          run-id: ${{ steps.get-workflow-run-id.outputs.run-id }}
+      - name: Unzip Artifacts
+        run: pushd build && unzip maven-repository.zip && popd
+```

.github/actions/get-workflow-run-id/action.yml

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+name: 'Get Workflow Run ID'
+description: 'Get the ID of the latest successful workflow run for a given workflow.'
+author: 'sjohnr'
+
+inputs:
+  repository:
+    description: 'The repository owner and name (e.g. spring-projects/spring-security).'
+    required: true
+  workflow-id:
+    description: 'The ID of the workflow or the workflow file name (e.g. build-and-deploy.yml).'
+    required: true
+
+outputs:
+  run-id:
+    description: 'The ID of the latest successful workflow run.'
+    value: ${{ steps.get-workflow-run-id.outputs.run-id }}
+
+runs:
+  using: 'composite'
+  steps:
+    - id: get-workflow-run-id
+      name: Get Workflow Run ID
+      shell: bash
+      env:
+        GH_TOKEN: ${{ github.token }}
+      run: |
+        runId=$(gh run list -R ${{ inputs.repository }} -w ${{ inputs.workflow-id }} -s success --json databaseId -q '.[0].databaseId')
+        echo "run-id=$runId" >> $GITHUB_OUTPUT