Support automatic recognition of external Maven components in GUI Designer

### Description

In Maven projects, NetBeans GUI Designer does not automatically detect external components added as dependencies in the pom.xml. Unlike IntelliJ IDEA, which registers these components in the palette automatically, NetBeans requires manual steps to use third-party libraries in forms.

### Use case/motivation

Suggested improvement:
Allow the GUI Designer to recognize and register external Maven dependencies automatically, similar to IntelliJ IDEA’s behavior

### Related issues

_No response_

### Are you willing to submit a pull request?

No

No file, test, or entry point is named. Start by locating how the GUI Designer reads Maven dependencies from pom.xml and how external components are registered in the palette. Done means external Maven components are recognized and registered automatically without the current manual steps.

Written by the indexing model from the issue text.