I would also like the ability to add/remove options to the context menu (right-click menu). I highlight/bold/underline a lot of text in documents written by others for my profession and would prefer to have this available in the context menu like it is in Microsoft Office. This would be similar to adding/removing buttons/features to/from the "Quick Access Toolbar"; instead, there should be a section in the Settings menu of the ONLYOFFICE Documents Editor that allows the user to customize which features or functions are present in the context menu.

An example of this is: the user can remove the "AI" or "Hyperlink" options for a cleaner context-menu list, and add the "Highlight text"/"Highlight color" (which there is currently no customizable keyboard shortcut for) or "Copy Formatting"/"Paste Formatting" (which is currently performed by inputting Ctrl+Alt+C / Ctrl+Alt+V) options if these actions are used frequently by the user and preferred on the context menu.

You may find a demonstration of this feature in LibreOffice. Travel to the right-hand hamburger menu (or the "Tools" drop-down menu tab depending on your version) and click "Customize", where you are presented with a "Context Menus" tab that allows you to perform what is suggested here. This YouTube video demonstrates this at the 3 minutes and 35 seconds mark: https://youtu.be/m50H0AlylqY?t=215

Essentially: please give customization power to the user to manage which buttons/functions/features (that are already present on the Ribbon, or have a customizable keyboard shortcut for their action) appear within the context (right-click) menu. Thank you!

Sorry I don't know anything about programming.
but I like Only office.

Can you provide a link to a documentation of any other processor that describes the process of customization for the reference?

the user can choose what items they want to display in the menu. because cut copy paste is easily accessible with a keyboard shortcut, but there are some items that I use often but there is no keyboard shortcut for them. For example: highlight,

Please elaborate on your suggestion. What customization you suggest for the context menu exactly?

After selecting a word (or words) a customized right-click menu would be very practical.