Consult-based interface to Reftex.

Warning: Work In Progress, will break often!

The goal is to replace RefTeX’s aging UI with something less clunky and more powerful.

• consult-reftex-insert-reference: Insert reference using Consult.
• consult-reftex-goto-label: Goto reference using Consult.

So far previews of labels and references are supported.

• [X] Reference and label support
• [ ] (Marginalia) annotations with pretty symbols
• [ ] Bibliography and citation support
• [X] (Embark) Support for Embark actions