workspace: add repository url

packages/scoreboard-xcpcio/package.json

@@ -3,6 +3,7 @@
     "license": "AGPL-3.0-or-later",
     "version": "0.0.5-beta.2",
     "main": "index.ts",
+    "repository": "https://github.com/hydro-dev/Hydro.git",
     "scripts": {
         "postinstall": "node -r @hydrooj/register install.ts"
     },