Inline LaTeX support

[virgile-dev]

Feature Request

Is your feature request related to a problem or unsupported use case? Please describe.
Users want to be able to type formulas within a paragraph.

Describe the solution you'd like
Be able to type inline LaTeX

Describe alternatives you've considered
Use a inline LaTeX block

Discovery, Documentation, Adoption, Migration Strategy
This was explored during the hackdays: https://github.com/suitenumerique/hackdays2025/tree/main/submissions/haxathon
And in this PR: #1061

Do you want to work on it through a Pull Request?