Allow possibility to override default resource filter form options

[dsuren1]

Description

This PR allows overriding the default filter options and removing any duplicates from the resource catalog page's plugin configuration

[gemini-code-assist]

Summary of Changes

Hello @dsuren1, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the configurability of the resource catalog page by allowing external configurations to override or extend the default set of filter options. A key improvement is the introduction of logic to prevent and remove duplicate filter entries, ensuring that the displayed filter list remains unique and functional. This change provides more control over the user interface and improves the robustness of the filter management system.

Highlights

• Filter Option Overriding: The pull request introduces the capability to override default filter options on the resource catalog page, providing greater flexibility for customization.
• Duplicate Filter Removal: A mechanism has been implemented to automatically remove any duplicate filter entries from the resource catalog page's plugin configuration, ensuring a clean and consistent list of filters.
• Code Refactoring: The getPageFilterForm function in resource_page_catalog.html has been refactored to utilize a JavaScript Map for processing filter items, which facilitates the unique identification and handling of filter options.

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[gemini-code-assist]

Code Review

This pull request introduces a mechanism to override default filter options and remove duplicates, which is a great enhancement. However, the current implementation has a potential issue where filter items without an id (such as dividers) would be unintentionally removed. I've provided a suggestion to address this by ensuring all items are handled correctly, preserving those without an ID while still deduplicating those with one.