chore: remove concurrently (#407)

It was frustrating to use since it you can't really use the keyboard to control tests. Instead you just have to manually trigger the test (e.g. press enter)

Author: ojeytonwilliams

package.json

@@ -41,7 +41,6 @@
     "@types/chai": "^4.3.20",
     "@typescript-eslint/eslint-plugin": "^8.31.0",
     "@typescript-eslint/parser": "^8.31.0",
-    "concurrently": "^9.2.0",
     "eslint": "9.31.0",
     "eslint-config-prettier": "10.1.5",
     "eslint-config-xo": "0.46.0",
@@ -94,7 +93,6 @@
     "lint": "eslint . --max-warnings 0 && prettier --check . && tsc --build",
     "format": "prettier --write .",
     "test": "vitest",
-    "test:watch": "concurrently -i --raw --prefix none 'pnpm test:unit --watch' --raw 'pnpm test:integration --watch'",
     "test:unit": "vitest --config vitest.unit.config.mjs",
     "test:integration": "vitest --config vitest.integration.config.mjs",
     "prepare": "husky install",