chore: ensure repl gets it base config on setup (#579)

so that people are not confused when setting up the repo

Author: dummdidumm

packages/repl/package.json

@@ -10,7 +10,8 @@
 		"prepublishOnly": "npm run package",
 		"check": "svelte-kit sync && svelte-check",
 		"lint": "prettier --check .",
-		"format": "prettier --write ."
+		"format": "prettier --write .",
+		"prepare": "svelte-kit sync"
 	},
 	"repository": {
 		"type": "git",