Add core:stop and always use npm --prefix

Author: myieye

package.json

@@ -29,9 +29,10 @@
     "bump-versions": "ts-node ./lib/bump-versions.ts",
     "test": "jest",
     "test:coverage": "jest --coverage",
-    "core:start": "cd ../paranext-core && npm run start",
-    "core:pull": "git -C ../paranext-core pull --ff-only",
+    "core:start": "npm --prefix ../paranext-core start",
+    "core:stop": "npm --prefix ../paranext-core stop",
     "core:install": "npm --prefix ../paranext-core install",
+    "core:pull": "git -C ../paranext-core pull --ff-only",
     "core:update": "npm run core:pull && npm run core:install"
   },
   "browserslist": [],