feat(core): external supports array

[hardfist]

Related issue (if exists)

closes #1803

Summary

🤖 Generated by Copilot at 3f82dc2

This pull request adds support for array values in external module configuration and simplifies the logic for handling different external types. It introduces a new ExternalRequest struct to represent the request of an external module as a vector of strings, and updates the ExternalModule struct and its methods accordingly. It also modifies the ExternalItemValue enum, the plugin.rs file, and the umd_library_plugin.rs file to use the new struct and handle array values.

Walkthrough

🤖 Generated by Copilot at 3f82dc2

• Introduce ExternalRequest struct to wrap external module requests as vectors of strings (link, link, link, link)
• Update ExternalModule struct and methods to use ExternalRequest instead of String for request field and id generation (link, link, link, link, link, link)
• Update get_external_module method in plugin.rs to handle Array variant of ExternalItemValue and convert it to ExternalRequest (link, link)
• Update get_umd_library_source method in umd_library_plugin.rs to use as_str method of ExternalRequest to get first element of request vector (link)