build(devcontainer): add VS Code Extension: Black Formatter

.devcontainer/devcontainer.json

@@ -4,7 +4,6 @@
   "name": "Ubuntu",
   // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
   "image": "mcr.microsoft.com/devcontainers/base:noble",
-
   // Features to add to the dev container. More info: https://containers.dev/features.
   "features": {
     "ghcr.io/devcontainers/features/azure-cli:1": {},
@@ -14,20 +13,20 @@
     "ghcr.io/devcontainers-extra/features/poetry:2": {},
     "ghcr.io/devcontainers-extra/features/tailscale:1": {}
   },
-
   // Use 'forwardPorts' to make a list of ports inside the container available locally.
   // "forwardPorts": [],
-
   // Use 'postCreateCommand' to run commands after the container is created.
   // "postCreateCommand": "uname -a",
-
   // Configure tool-specific properties.
   "customizations": {
     "vscode": {
-      "extensions": ["esbenp.prettier-vscode", "mhutchie.git-graph"]
+      "extensions": [
+        "esbenp.prettier-vscode",
+        "mhutchie.git-graph",
+        "ms-python.black-formatter"
+      ]
     }
   }
-
   // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
   // "remoteUser": "root"
 }