[FEATURE] Enable html/markdown in display name box so we can use custom icons

[git-3000]

Is your feature request related to a problem? Please describe.
I want to add a small Bitcoin emoji/icon beside my username but unicode consortium company who controls the emojis has not added the Bitcoin emoji yet.

Describe the solution you'd like
Allow html or markdown in the username box

<img src="https://example.com/images/Bitcoin-icon.png" alt="Bitcoin Icon" width="16px" height="16px">
[!(https://example.com/images/Bitcoin-icon.png)]

Bounty (in Bitcoin sats) offered for the implementation
I don't know how much.

Additional context