Move rust checks to own file

apps/labrinth/package.json

@@ -1,12 +0,0 @@
-{
-  "name": "@modrinth/labrinth",
-  "scripts": {
-    "build": "cargo build",
-    "dev": "cargo run",
-    "test": "cargo test",
-    "lint": "cargo fmt --check && cargo clippy -- -D warnings",
-    "fix": "cargo fmt && cargo clippy --fix"
-  },
-  "dependencies": {
-  }
-}