Add working test examples, and github workflow to run test and build

I want to move these to another directory, but starting here

.github/workflows/build_and_test.yml

@@ -0,0 +1,33 @@
+name: Build Desktop Apps
+
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.12
+          cache: "pip"
+
+      - run: pip install -r requirements.txt
+
+      - name: Build Core
+        run: hatch build
+        working-directory: ./core
+
+      - name: Test Core
+        run: hatch test
+        working-directory: ./core
+
+      - name: Build Studio
+        run: hatch build
+        working-directory: ./studio
+
+      - name: Test Studio
+        run: hatch test
+        working-directory: ./studio

core/tests/test_example.py

@@ -0,0 +1,10 @@
+import unittest
+
+
+class TestExample(unittest.TestCase):
+    def test_a(self):
+        self.assertEqual(42, 42)
+
+
+if __name__ == "__main__":
+    unittest.main()

requirements.txt

@@ -22,3 +22,4 @@ tomli==2.0.1
 tomlkit==0.13.0
 watchfiles==0.22.0
 websockets==12.0
+hatch==1.12.0

studio/tests/test_studio_example.py

@@ -0,0 +1,10 @@
+import unittest
+
+
+class TestExample(unittest.TestCase):
+    def test_a(self):
+        self.assertEqual(42, 42)
+
+
+if __name__ == "__main__":
+    unittest.main()