Add more stuff from dtk-template

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+# E203: whitespace before ':'
+# E501: line too long
+extend-ignore = E203,E501

.github/workflows/build.yml

@@ -18,11 +18,10 @@ jobs:
         version: [jp, eu, us]
 
     steps:
-    # Checkout the repository (shallow clone)
+    # Checkout the repository
     - name: Checkout
       uses: actions/checkout@v4
       with:
-        fetch-depth: 0
         submodules: recursive
 
     # Set Git config

.vscode/tasks.json

@@ -0,0 +1,16 @@
+{
+    // Use Ctrl+Shift+B to run build tasks.
+    // Or "Run Build Task" in the Command Palette.
+    "version": "2.0.0",
+    "tasks": [
+      {
+        "label": "ninja",
+        "type": "shell",
+        "command": "ninja",
+        "group": {
+          "kind": "build",
+          "isDefault": true
+        }
+      },
+    ]
+  }