Update Devcontainer/CI to Python 3.12 (#2226)

.devcontainer.json

@@ -1,20 +1,26 @@
 {
   "name": "home-assistant/intents",
-  "image": "mcr.microsoft.com/vscode/devcontainers/python:0-3.10",
-  "containerEnv": { "DEVCONTAINER": "1" },
-  "settings": {
-    "python.languageServer": "Pylance",
-    "python.linting.enabled": true,
-    "python.linting.pylintEnabled": true,
-    "editor.formatOnSave": true,
-    "editor.formatOnType": true,
-    "files.trimTrailingWhitespace": true
+  "image": "mcr.microsoft.com/devcontainers/python:3.12",
+  "containerEnv": {
+    "DEVCONTAINER": "1"
+  },
+  "customizations": {
+    "vscode": {
+      "settings": {
+        "python.languageServer": "Pylance",
+        "python.linting.enabled": true,
+        "python.linting.pylintEnabled": true,
+        "editor.formatOnSave": true,
+        "editor.formatOnType": true,
+        "files.trimTrailingWhitespace": true,
+        "extensions": [
+          "ms-python.python",
+          "ms-python.vscode-pylance",
+          "esbenp.prettier-vscode"
+        ]
+      }
+    }
   },
-  "extensions": [
-    "ms-python.python",
-    "ms-python.vscode-pylance",
-    "esbenp.prettier-vscode"
-  ],
   "postCreateCommand": "script/setup",
   "remoteUser": "vscode"
-}
+}

.github/workflows/ci.yaml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.12"
           cache: "pip"
       - run: script/setup
       - run: python3 -m script.intentfest add_language test_add_language_generates_valid_data "CI Added Language"

.github/workflows/gh-pages.yml

@@ -36,7 +36,7 @@ jobs:
           node-version: ${{ env.NODE_VERSION }}
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.12"
           cache: "pip"
       - name: Install Python dependencies
         run: script/setup