[Fix] fix test badge on readme and add testing workflow

.github/workflows/tests.yml

@@ -0,0 +1,26 @@
+name: Tests
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        python-version: ['3.12']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install tox tox-gh-actions
+    - name: Test with tox
+      run: tox

README.md

@@ -1,6 +1,6 @@
 # CAPY - Club Assistant in Python  
 
-[![Tests](https://github.com/CApy-RPI/mvp/actions/workflows/tests.yml/badge.svg)](https://github.com/CApy-RPI/mvp/actions/workflows/tests.yml)
+[![Tests](https://github.com/CApy-RPI/onboarding/actions/workflows/tests.yml/badge.svg)](https://github.com/CApy-RPI/onboarding/actions/workflows/tests.yml)
 
 ## **Overview**