Automatic capitalization of references

Description

At the moment @section_test always gets capitalized as Section 1.1, even when it is not the first word in the sentence. The same applies to figures and other types of references.

While it is possible to manually correct the capitalization for each reference, that process is tedious.

Disclaimer: I have no idea about the best way that this feature should be accessed (maybe as a show rule?) and also have no idea about the problems with other languages.

Here is the start of a small discord conversation about this, not sure what part of that is relevant.

I will try to get a workaround going, but I have to submit my masters thesis in a few days, so I am not sure that I will have the time to do so.

Use Case

This feature would make the output document better and make writing easier for users, by automatically selecting the correct capitalization of references.

Start by tracing how @section_test, figure references, and other references are rendered and where their capitalization is selected. The issue names no files or tests, so first determine the relevant reference-rendering entry points and review the linked discussion before deciding how language-specific behavior should work. Done means references are capitalized appropriately by sentence position without requiring manual correction.