chore: migrate to pkgmgr and ignore non-npm lockfiles

Author: kentcdodds

.gitignore

@@ -1,5 +1,11 @@
 node_modules
 
+# non-npm JavaScript lockfiles
+yarn.lock
+pnpm-lock.yaml
+bun.lock
+bun.lockb
+
 workspace/
 **/.cache/
 **/build/

package-lock.json

@@ -32,9 +32,9 @@
     "#*": "./*"
   },
   "scripts": {
-    "postinstall": "cd ./epicshop && npm install",
-    "start": "npx --prefix ./epicshop epicshop start",
-    "dev": "npx --prefix ./epicshop epicshop start",
+    "postinstall": "cd ./epicshop && pkgmgr install",
+    "start": "pkgmgrx --prefix ./epicshop epicshop start",
+    "dev": "pkgmgrx --prefix ./epicshop epicshop start",
     "setup": "node ./epicshop/setup.js",
     "setup:custom": "node ./epicshop/setup-custom.js",
     "build": "cd ./playground && npm run build",
@@ -63,7 +63,8 @@
     "eslint": "^9.34.0",
     "npm-run-all": "^4.1.5",
     "prettier": "^3.6.2",
-    "typescript": "^5.9.2"
+    "typescript": "^5.9.2",
+    "pkgmgr": "^1.1.1"
   },
   "workspaces": [
     "./exercises/**/*"