add: spell & grammar check ci job

Author: Rahul-4480

.github/workflows/spellcheck.yml

@@ -0,0 +1,52 @@
+name: Spell Check and Grammar Check
+
+on: 
+  pull_request:
+    branches: [main]
+    paths: ["content/blog/*"]
+
+jobs:
+  spellcheck:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v44
+        with:
+          files: |
+            content/blog/**.md
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install openai==0.28
+
+      - name: Run spell check
+        id: spellcheck
+        env:
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }} 
+        run: |
+          ALL_CHANGED_FILES='${{ steps.changed-files.outputs.all_changed_files }}'
+          python .github/scripts/spellcheck.py $ALL_CHANGED_FILES
+        continue-on-error: true  
+
+      - name: Post comment for pull request
+        if: github.event_name == 'pull_request'
+        uses: mshick/add-pr-comment@v2
+        with:
+          message-path: spell_check_result_with_lines.json
+
+      - name: Fail the job if spell check failed
+        if: steps.spellcheck.outcome == 'failure'
+        run: exit 1