chore: Add ossf-scorecard scanning workflow (#1460)

* Add ossf-scorecard scanning workflow

* Add end of file newline

* Update .github/workflows/ossf-scorecard.yml

---------

Co-authored-by: otelbot <[email protected]>
Co-authored-by: Kayla Reopelle <[email protected]>

Author: 3 people

.github/workflows/ossf-scorecard.yml

@@ -0,0 +1,48 @@
+name: OSSF Scorecard
+
+on:
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: "18 23 * * 6" # once a week
+  workflow_dispatch:
+
+permissions: read-all
+
+jobs:
+  analysis:
+    if: ${{ github.repository == 'open-telemetry/opentelemetry-ruby-contrib' }}
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed for Code scanning upload
+      security-events: write
+      # Needed for GitHub OIDC token if publish_results is true
+      id-token: write
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+
+      - uses: ossf/scorecard-action@f49aabe0b5af0936a0987cfb85d86b75731b0186 # v2.4.1
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          publish_results: true
+
+      # Upload the results as artifacts (optional). Commenting out will disable
+      # uploads of run results in SARIF format to the repository Actions tab.
+      # https://docs.github.com/en/actions/advanced-guides/storing-workflow-data-as-artifacts
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard (optional).
+      # Commenting out will disable upload of results to your repo's Code Scanning dashboard
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@5f8171a638ada777af81d42b55959a643bb29017 # v3.28.12
+        with:
+          sarif_file: results.sarif