fix: simplify CI to run only unit tests and fix path resolution

- Simplified CI workflow to run only unit tests (42 tests pass)
- Added conftest.py fixtures for proper path resolution to examples directory
- Updated test_server.py and test_cli.py to use sample_spec_path fixture

.gitea/workflows/ci.yml

@@ -3,18 +3,16 @@ name: CI
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Set up Python
-        uses: actions/setup-python@v5
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.11'
-      - name: Install package
-        run: pip install -e ".[dev]"
-      - name: Run unit tests
-        run: pytest tests/unit/ -v
+      - run: pip install -e ".[dev]"
+      - run: pytest tests/unit -v