chore(react-icons): add bundle-size safe guards

.github/CODEOWNERS

@@ -1,5 +1,6 @@
 /.github/ISSUE_TEMPLATE/01-react-icons-bug-report.yml @microsoft/cxe-prg
 /.github/ISSUE_TEMPLATE/02-react-icons-feature-request.yml @microsoft/cxe-prg
+/.github/workflows/bundle-size.baseline.yml @microsoft/cxe-prg
 
 ## packages
 packages/icon-app @microsoft/cxe-prg

.github/workflows/bundle-size.baseline.yml

@@ -0,0 +1,55 @@
+name: Bundle Size Baseline
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'packages/react-icons/**'
+
+jobs:
+  bundle-size-baseline:
+    if: ${{ github.repository_owner == 'microsoft' }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      actions: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: '**/package-lock.json'
+
+      - run: npm ci
+
+      - name: Prepare bundle size report
+        run: |
+          npm run build
+          npm run bundle-size
+        working-directory: packages/react-icons
+
+      - name: Update bundle size baseline
+        run: npx monosize upload-report --branch main --commit-sha local
+        working-directory: packages/react-icons
+
+      - name: Check for changes
+        id: check-changes
+        run: |
+          if git diff --quiet packages/react-icons/monosize-baseline.json; then
+            echo "changes=false" >> $GITHUB_OUTPUT
+          else
+            echo "changes=true" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Commit and push baseline update
+        if: steps.check-changes.outputs.changes == 'true'
+        run: |
+          git config --local user.email "[email protected]"
+          git config --local user.name "GitHub Action"
+          git add packages/react-icons/monosize-baseline.json
+          git commit -m "chore(react-icons): update bundle size baseline [skip ci]"
+          git push origin HEAD:main

.github/workflows/pr.yml

@@ -162,6 +162,12 @@ jobs:
         npm run build:verify
       working-directory: packages/react-icons
 
+    - name: Bundle-Size @fluentui/react-icons
+      run: |
+        npm run bundle-size
+        npx monosize compare-reports
+      working-directory: packages/react-icons
+
     - name: Build @fluentui/react-native-icons
       run: |
         npm run build