feat: AM2.0 suppport in config module

[naman-contentstack]

Add Asset Management URL Configuration Support

Adds support for configuring a custom asset management API endpoint in the CLI region configuration, following the same pattern as other service URLs (composableStudioUrl, personalizeUrl, launchHubUrl).

Changes

• Added assetManagementUrl property to the Region interface (optional for backward compatibility)
• Added --asset-management flag to config:set:region command
• Auto-generates asset management URL from UI host by appending /am/api when flag is not provided
• Updated region handler utilities to include asset management URL in sanitization and retrieval
• Added success messages and command examples

Behavior

• If --asset-management flag is provided: Uses the provided URL as-is
• If flag is not provided: Auto-generates from uiHost + '/am/api' (e.g., https://dev9-app.csnonprod.com:443/am/api)

Context

This is the first step in supporting external asset management projects where assets will be linked to external projects instead of being saved directly in the stack during export operations.