chore(ci): add OpenSSF scorecard

Author: scop

.github/workflows/scorecard.yml

@@ -0,0 +1,35 @@
+name: Scorecard
+on:
+  branch_protection_rule:
+  schedule:
+    - cron: "42 4 * * 6"
+  push:
+    branches:
+      - main
+
+permissions: {}
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+      security-events: write
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+      - uses: ossf/scorecard-action@05b42c624433fc40578a4040d5cf5e36ddca8cde # v2.4.2
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          publish_results: true
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        with:
+          path: results.sarif
+          retention-days: 5
+      - uses: github/codeql-action/upload-sarif@192325c86100d080feab897ff886c34abd4c83a3 # v3.30.3
+        with:
+          sarif_file: results.sarif

README.md

@@ -3,6 +3,7 @@
 [![Main push and PR checks](https://github.com/scop/pre-commit-shfmt/actions/workflows/check.yml/badge.svg)](https://github.com/scop/pre-commit-shfmt/actions/workflows/check.yml)
 [![Tag checks](https://github.com/scop/pre-commit-shfmt/actions/workflows/check-tag.yml/badge.svg)](https://github.com/scop/pre-commit-shfmt/actions/workflows/check-tag.yml)
 [![CodeQL](https://github.com/scop/pre-commit-shfmt/actions/workflows/github-code-scanning/codeql/badge.svg)](https://github.com/scop/pre-commit-shfmt/actions/workflows/github-code-scanning/codeql)
+[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/scop/pre-commit-shfmt/badge)](https://scorecard.dev/viewer/?uri=github.com%2Fscop%2Fpre-commit-shfmt)
 
 [shfmt](https://github.com/mvdan/sh#shfmt) hook for
 [pre-commit](https://pre-commit.com), with auto install.