tests: add minimal unit test system

.github/workflows/client_tests.yml

@@ -0,0 +1,43 @@
+name: Client Test Suite
+
+# This workflow contains all tests for the openqda core-client
+# which includes for now:
+# - check code-format using code-formatter
+# - check code-style using linter
+#
+# In the future we also want to have:
+# - style lint
+# - unit-tests
+# - vue component tests
+# - e2e tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  unit:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: setup node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - name: cache dependencies
+        uses: actions/cache@v4
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node20-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node20-
+
+      - name: install node modules
+        run: |
+          npm i
+      - name: run unit tests
+        run: |
+          npm run ci:unit

README.md

@@ -33,3 +33,8 @@ then navigate to  http://localhost:5173/ in your browser.
 * [quill editor v2 documenation](https://quilljs.com/docs/quickstart)
 * [vue 3](https://vuejs.org/api/) (particularly [composition API](https://vuejs.org/guide/introduction.html#api-styles) ) 
 
+## Run tests
+
+```shell
+npm run test:unit
+```