chore: migrate npmrc settings to pnpm workspace config

Author: jbroma

.npmrc

@@ -4,6 +4,12 @@ packages:
   - "tests/*"
   - "website"
 
+autoInstallPeers: false
+linkWorkspacePackages: true
+packageManagerStrict: true
+packageManagerStrictVersion: false
+updateNotifier: false
+
 catalog:
   "@rspack/core": ^1.6.0
   "@rslib/core": ^0.6.3