[FEATURE]: Expose hooks for modifying API usage and context window display #8791

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Expose plugin usable hooks for modifying or replacing the text found in the context display (in sidebar or upper right corner if sidebar disabled).

ex:

I use a subscription based provider that has rate limits which reset every few hours, I therefore do not need pricing information for the session, but would rather have a percentage of my rate limit displayed.

All that is needed for myself and others to customize this display are hooks for replacing the generation of this text with our own function, and for controlling when the display refreshes (interval or on event).