chore: unify sandbox (#13012)

Author: Rich-Harris

.vscode/launch.json

@@ -1,22 +1,6 @@
 {
 	"version": "0.2.0",
 	"configurations": [
-		{
-			"type": "chrome",
-			"request": "launch",
-			"name": "Playground: Browser",
-			"url": "http://localhost:10001"
-		},
-		{
-			"type": "node",
-			"request": "launch",
-			"runtimeArgs": ["--watch"],
-			"name": "Playground: Server",
-			"outputCapture": "std",
-			"program": "start.js",
-			"cwd": "${workspaceFolder}/playgrounds/demo",
-			"cascadeTerminateToConfigurations": ["Playground: Browser"]
-		},
 		{
 			"type": "node",
 			"request": "launch",
@@ -26,11 +10,5 @@
 				"NODE_OPTIONS": "--stack-trace-limit=10000"
 			}
 		}
-	],
-	"compounds": [
-		{
-			"name": "Playground: Full",
-			"configurations": ["Playground: Server", "Playground: Browser"]
-		}
 	]
 }

playgrounds/demo/.gitignore

@@ -1,3 +1,4 @@
-input/*
-output/*
-!.gitkeep
+/dist/client/*
+/dist/server/*
+/output
+/src/*