Adds devcontainer configuration

vscode integration
 - linting/formating
 - test detection
 - debug configuration

Author: bj00rn

.devcontainer/devcontainer.json

@@ -0,0 +1,60 @@
+{
+  "name": "SAIC Python MQTT Gateway Dev",
+  "image": "mcr.microsoft.com/devcontainers/python:3.12",
+  "runArgs": [
+    "--env-file",
+    ".env"
+  ],
+  "customizations": {
+    "vscode": {
+      "settings": {
+        "launch": {
+          "configurations": [
+            {
+              "name": "Python: Debug Gateway",
+              "type": "debugpy",
+              "request": "launch",
+              "program": "./src/main.py",
+              "justMyCode": true,
+              "console": "integratedTerminal"
+            }
+          ],
+          "compounds": []
+        },
+        "python.testing.pytestArgs": [
+          "tests"
+        ],
+        "python.testing.unittestEnabled": false,
+        "python.testing.pytestEnabled": true,
+        "python.defaultInterpreterPath": "./.venv/bin/python",
+        "terminal.integrated.shell.linux": "/bin/bash",
+        "[python]": {
+          "editor.formatOnSave": true,
+          "editor.defaultFormatter": "charliermarsh.ruff"
+        }
+      },
+      "extensions": [
+        "charliermarsh.ruff",
+        "ms-azuretools.vscode-docker",
+        "ms-python.debugpy",
+        "ms-python.mypy-type-checker",
+        "ms-python.pylint",
+        "ms-python.python",
+        "ms-python.vscode-pylance"
+      ]
+    }
+  },
+  "postCreateCommand": [
+    ".devcontainer/scripts/setup.sh"
+  ],
+  "containerEnv": {
+    "PYTHONPATH": "${containerWorkspaceFolder}/src"
+  },
+  "remoteEnv": {
+      "MQTT_URI": "${containerEnv:MQTT_BROKER_URI}",
+      "MQTT_USER": "${containerEnv:MQTT_USERNAME}",
+      "MQTT_PASSWORD": "${containerEnv:MQTT_PWD}",
+      "SAIC_USER": "${containerEnv:SAIC_USERNAME}",
+      "SAIC_PASSWORD": "${containerEnv:SAIC_PWD}"
+  }
+}