Add settings and extension recommendations (#139)

- Added recommended settings for the Pylance and Pyright extensions
- Enabled pytest and debugging support in configuration
- Reformatted code with Prettier
---------
Co-authored-by: Chris <git@nootch.de>

docker-compose.yaml

@@ -1,22 +1,22 @@
 ---
 networks:
   eos:
-    name: 'eos'
+    name: "eos"
 services:
   eos:
-    image: 'akkudoktor/eos:${EOS_VERSION}'
+    image: "akkudoktor/eos:${EOS_VERSION}"
     read_only: true
     build:
       context: .
-      dockerfile: 'Dockerfile'
+      dockerfile: "Dockerfile"
       args:
-        PYTHON_VERSION: '${PYTHON_VERSION}'
+        PYTHON_VERSION: "${PYTHON_VERSION}"
     init: true
     environment:
-      FLASK_RUN_PORT: '${EOS_PORT}'
+      FLASK_RUN_PORT: "${EOS_PORT}"
     networks:
-      - 'eos'
+      - "eos"
     volumes:
       - ./src/akkudoktoreos/config.py:/opt/eos/akkudoktoreos/config.py:ro
     ports:
-      - '${EOS_PORT}:${EOS_PORT}'
+      - "${EOS_PORT}:${EOS_PORT}"