add chicken debugger launch.json

agb/.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "gdb",
+            "request": "attach",
+            "name": "Attach to gdbserver",
+            "executable": "target/thumbv4t-none-eabi/debug/examples/chicken",
+            "target": "127.0.0.1:2345",
+            "remote": true,
+            "cwd": "${workspaceRoot}",
+            "gdbpath": "arm-none-eabi-gdb",
+        }
+    ]
+}