chore: add VS Code and devcontainer configurations (#429)

Author: jholveck

.devcontainer/devcontainer.json

@@ -0,0 +1,23 @@
+{
+  /* We use python:3 because it's based on Debian, which has libxcb-errors0 available.  The default universal image is
+   * based on Ubuntu, which doesn't. */
+  "image": "mcr.microsoft.com/devcontainers/python:3",
+  "features": {
+    "ghcr.io/devcontainers-extra/features/apt-get-packages:1": {
+      "packages": [
+        /* Needed for MSS generally */
+        "libxfixes3", 
+        /* Needed for testing */
+        "xvfb", "xauth",
+        /* Improves error messages */
+        "libxcb-errors0",
+        /* We include the gdb stuff to troubleshoot when ctypes stuff goes off the rails. */
+        "debuginfod", "gdb",
+        /* GitHub checks out the repo with git-lfs configured. */
+        "git-lfs"
+      ],
+      "preserve_apt_list": true
+    }
+  },
+  "postCreateCommand": "echo set debuginfod enabled on | sudo tee /etc/gdb/gdbinit.d/debuginfod.gdb"
+}

.vscode/extensions.json

@@ -0,0 +1,14 @@
+{
+	// See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+	// List of extensions which should be recommended for users of this workspace.
+	"recommendations": [
+		"charliermarsh.ruff",
+		"ms-python.mypy-type-checker",
+		"ms-python.python",
+		"ms-python.vscode-pylance",
+		"ms-python.vscode-python-envs",
+	],
+	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+	"unwantedRecommendations": []
+}

.vscode/settings.json

@@ -1,4 +1,9 @@
 {
+    "python.analysis.typeCheckingMode": "off",  // We'll use Mypy instead of the built-in Pyright
+    "python.testing.pytestEnabled": true,
+    "python.testing.unittestEnabled": false,
+    "ruff.enable": true,
+
     "languageToolLinter.languageTool.ignoredWordsInWorkspace": [
         "bgra",
         "ctypes",
@@ -19,5 +24,5 @@
         "xrandr",
         "xserver",
         "zlib"
-    ]
-}
+    ],
+}