Added functionality to load menu items

[abdullai-t]

Summary / Highlights

Various functions and routes have been introduced to facilitate the loading of menu items. This includes the helper functions in the api_utils file to filter and prepare the menu items, as well as appropriate routes and handlers for these items. These additions will allow easier interaction with the menus within a given community context.

Details (Give details about what this PR accomplishes, include any screenshots etc)

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• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've tested my changes manually.
• I've added unit tests to my PR.

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• I've given my PR a meaningful title.
• I linked this PR to the relevant issue.
• I moved the linked issue from the "Sprint backlog" to "In progress" when I started this.
• I moved the linked issue to "QA Verification" now that it is ready to merge.