refactor: move VS Code config and debug compose to web-app workspace

Update launch.json and tasks.json to use multi-root workspace folder syntax for correct path resolution.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

web-app/.vscode/tasks.json

@@ -0,0 +1,33 @@
+// Sass configuration
+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "start-mongo",
+            "type": "docker-compose",
+            "dockerCompose": {
+                "up": {
+                  "detached": true,
+                  "build": true,
+                },
+                "files": [
+                  "${workspaceFolder:🌐 web-app}/docker-compose-debug.yml"
+                ],
+                "isBackground": true,
+                "problemMatcher": "Terminal will be reused by tasks, press any key to close it"
+            }
+        },
+        {
+            "label": "terminate-mongo",
+            "type": "docker-compose",
+            "dockerCompose": {
+                "down": {},
+                "files": [
+                    "${workspaceFolder:🌐 web-app}/docker-compose-debug.yml"
+                  ],
+            }
+        },
+    ]
+}