docs(ci): add a repeatable static analysis example (#6496)

* docs(ci): add a repeatable static analysis example

* fix(ci): isolate example reports and repair the guide link

---------

Co-authored-by: gongfpp <22683417+gongfpp@users.noreply.github.com>

examples/github-actions/rea-analysis.yml

@@ -0,0 +1,60 @@
+# Copy to .github/workflows/rea-analysis.yml on your default branch.
+name: REA static analysis example
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    env:
+      ARTIFACT_PATH: build/rea-ci-demo
+    steps:
+      - name: Prepare isolated report directory
+        id: reports
+        shell: bash
+        run: |
+          directory=$(mktemp -d "${RUNNER_TEMP:?}/rea-analysis.XXXXXX")
+          printf 'directory=%s\n' "${directory}" >> "${GITHUB_OUTPUT:?}"
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
+        with:
+          persist-credentials: false
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+        with:
+          node-version: "24.22.1"
+      - name: Install pinned REA
+        run: |
+          npm install --prefix "${RUNNER_TEMP}/rea-tool" --no-audit --no-fund --ignore-scripts --save-exact rea-agents@6.7.0
+          echo "${RUNNER_TEMP}/rea-tool/node_modules/.bin" >> "${GITHUB_PATH}"
+      - name: Build a known artifact
+        id: build
+        run: |
+          # Replace this step with your reviewed build, keeping ARTIFACT_PATH in sync.
+          mkdir -p build/rea-ci-demo
+          printf '%s\n' '{"name":"rea-ci-demo","version":"1.0.0","type":"module","main":"index.js"}' > build/rea-ci-demo/package.json
+          printf '%s\n' 'export const message = "hello";' 'throw new Error("This artifact must not be executed.");' > build/rea-ci-demo/index.js
+      - name: Analyze and retain the original exit status
+        id: analyze
+        shell: bash
+        env:
+          REPORT_DIR: ${{ steps.reports.outputs.directory }}
+        run: |
+          set +e
+          rea analyze-javascript-application "${GITHUB_WORKSPACE}/${ARTIFACT_PATH}" --json --full-output \
+            > "${REPORT_DIR}/analysis.json" 2> "${REPORT_DIR}/analysis.stderr"
+          status=$?
+          set -e
+          printf '%s\n' "${status}" > "${REPORT_DIR}/exit-code.txt"
+          exit "${status}"
+      - name: Upload available reports, including after analysis failure
+        if: ${{ always() && steps.reports.outputs.directory != '' }}
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        with:
+          name: rea-analysis
+          path: ${{ steps.reports.outputs.directory }}
+          if-no-files-found: warn
+          retention-days: 7