First attempt

This does not really work at all. The fwcd Kotlin plugin does not
support setting a current working directory in launch.json, which is an
issue since the project requires being in android/assets.

Someone almost added this, but has been stale for 4 years:
fwcd/vscode-kotlin#42

Author: willjallen

.vscode/debug_desktop.bat

@@ -0,0 +1,3 @@
+@echo off
+start cmd /k "cd /d %~dp0\.. && .\gradlew :desktop:debug"
+ping 127.0.0.1 -n 4 > nul

.vscode/extensions.json

@@ -0,0 +1,6 @@
+{
+    "recommendations": [
+        "fwcd.kotlin",
+        "vscjava.vscode-java-pack"
+    ]
+}

.vscode/launch.json

@@ -0,0 +1,23 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "kotlin",
+            "request": "attach",
+            "name": "Debug Desktop (Attach)",
+            "hostName": "localhost",
+            "projectRoot": "${workspaceFolder}",
+            "port": 5005,
+            "timeout": 30000,
+            "preLaunchTask": "debug_desktop"
+
+        },
+        {
+            "type": "kotlin",
+            "request": "launch",
+            "name": "Debug Desktop",
+            "projectRoot": "${workspaceFolder}/desktop",
+            "mainClass": "com.unciv.app.desktop.DesktopLauncher",
+        }
+    ]
+}

.vscode/tasks.json

@@ -0,0 +1,45 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build_all",
+            "type": "shell",
+            "command": "./gradlew build",
+            "problemMatcher": [],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        },
+        {
+            "label": "build_core",
+            "type": "shell",
+            "command": "./gradlew :core:build",
+            "problemMatcher": [],
+            "group": {
+                "kind": "build",
+            }
+        },
+        {
+            "label": "build_desktop",
+            "type": "shell",
+            "command": "./gradlew :desktop:build",
+            "problemMatcher": [],
+            "group": {
+                "kind": "build",
+            }
+        },
+        {
+            "label": "debug_desktop",
+            "type": "shell",
+            "command": "${workspaceFolder}\\.vscode\\debug_desktop.bat",
+            "problemMatcher": [],
+            "dependsOrder": "sequence",
+            "dependsOn": [
+                "build_core",
+                "build_desktop"
+            ]
+        },
+    ]
+}
+