✨ Add VS Code node:test debugging and runner config

launch.json: 'Debug current test file' F5 config running
node --test --strip-types on the active file.

settings.json: register .ts with the connor4312.nodejs-testing
extension via nodejs-testing.extensions, using --strip-types (the
repo pins node >=26 with native type stripping) instead of tsx, so
the extension discovers src/*.test.ts and shows Run/Debug lenses
above test() calls in the native Testing UI.

extensions.json: recommend connor4312.nodejs-testing; cspell.json:
allow 'connor' for the extension id.

.gitignore: un-ignore .vscode/launch.json so the config is shared.

.vscode/settings.json

@@ -1,4 +1,14 @@
 {
+    "nodejs-testing.extensions": [
+        {
+            "extensions": ["mjs", "cjs", "js"],
+            "parameters": []
+        },
+        {
+            "extensions": ["ts"],
+            "parameters": ["--strip-types"]
+        }
+    ],
     "[typescript]": {
         "editor.defaultFormatter": "oxc.oxc-vscode",
         "editor.formatOnSave": true