Add simplified CI/CD workflow with Hugging Face CLI

- Use Hugging Face CLI for deployment (more reliable than git)
- Basic syntax checking only (removed complex testing)
- Simplified workflow for better reliability
- Focus on essential CI/CD components

Author: nellaivijay

.github/workflows/ci-cd.yml

@@ -0,0 +1,53 @@
+name: CI/CD Pipeline
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+    
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.10'
+    
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+    
+    - name: Syntax check only
+      run: |
+        python -m py_compile app.py
+        echo "✅ Syntax check passed"
+
+  deploy:
+    needs: test
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+    
+    - name: Install Hugging Face CLI
+      run: |
+        pip install huggingface_hub
+    
+    - name: Deploy to Hugging Face Spaces
+      env:
+        HF_TOKEN: ${{ secrets.HF_TOKEN }}
+      run: |
+        # Deploy using Hugging Face CLI
+        huggingface-cli login --token $HF_TOKEN
+        huggingface-cli upload nellaivijay/research-assistant . --repo-type space --commit-message "Deploy from GitHub Actions"
+        
+        echo "✅ Deployed to Hugging Face Spaces using CLI"