Update CI workflow - minimal Gitea syntax

.gitea/workflows/ci.yml

@@ -10,40 +10,16 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        run: |
-          mkdir -p ${{ github.workspace }}
-          cd ${{ github.workspace }}
-          git clone --depth 1 https://github.com/actions/checkout.git _actions/checkout
-          cp -r _actions/checkout/* .
-          rm -rf _actions
-      
-      - name: Setup Python
-        run: |
+      - run: |
           python3 -m pip install --upgrade pip
-      
-      - name: Install dependencies
-        run: |
           pip install pytest
           pip install -r requirements.txt
-      
-      - name: Run tests
-        run: |
           pytest tests/ -v
 
   lint:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        run: |
-          mkdir -p ${{ github.workspace }}
-          cd ${{ github.workspace }}
-          git clone --depth 1 https://github.com/actions/checkout.git _actions/checkout
-          cp -r _actions/checkout/* .
-          rm -rf _actions
-      
-      - name: Run linter
-        run: |
+      - run: |
           pip install ruff
           ruff check .
 
@@ -51,15 +27,6 @@ jobs:
     runs-on: ubuntu-latest
     needs: test
     steps:
-      - name: Checkout
-        run: |
-          mkdir -p ${{ github.workspace }}
-          cd ${{ github.workspace }}
-          git clone --depth 1 https://github.com/actions/checkout.git _actions/checkout
-          cp -r _actions/checkout/* .
-          rm -rf _actions
-      
-      - name: Verify build
-        run: |
+      - run: |
           pip install -r requirements.txt
           python -c "from man_card import cli, man_parser, card_generator, templates, config; print('All modules import successfully')"