fix(cli): use pathToFileURL for dynamic imports on Windows (#560)

Node's ESM loader rejects bare Windows paths (e.g. C:\...) passed to
dynamic import(), interpreting the drive letter as a URL protocol.
Convert the package-manager.js path through pathToFileURL() to produce
a valid file:// URL, matching the fix already applied to the server
import on line 628.

packages/web/bin/cli.js

@@ -926,7 +926,7 @@ const commands = {
       executeUpdate,
       detectPackageManager,
       getCurrentVersion,
-    } = await import(packageManagerPath);
+    } = await import(pathToFileURL(packageManagerPath).href);
 
     // Check for running instances before update
     let runningInstances = [];