Add support for italic text markdown syntax

[elchiconube]

Is your feature request related to a problem? Please describe.
I'm always frustrated when I need to format text in italics using markdown syntax and the current system doesn't recognize or render the standard italic markers. When I use text or text to indicate italic formatting, the text appears as plain text with the asterisks or underscores visible, rather than being properly rendered in italic style.
Describe the solution you'd like
I would like the system to support standard markdown syntax for italic text. Specifically:

Single asterisks (* text *) should render text in italics
Single underscores (_ text _) should also render text in italics
The markers should be hidden in the rendered output, displaying only the formatted italic text
This should work consistently across all text input areas where markdown is expected

Describe alternatives you've considered

Using HTML tags like text or text, but this breaks the markdown-first approach and is less intuitive for users familiar with markdown
Using rich text editors, but this adds unnecessary complexity when markdown would be sufficient
Copy-pasting pre-formatted italic text from external sources, which is cumbersome and breaks the workflow

Additional context
Italic text formatting is a fundamental part of the markdown specification and is widely supported across most markdown parsers and platforms (GitHub, Stack Overflow, Reddit, Discord, etc.). Adding this support would improve text formatting capabilities and align the system with standard markdown conventions that users already know and expect.