Feat: Option for showing a message's edit history

[nushea]

Description

This PR adds a button on the right-click menu whenever a message is edited to allow you to see all the previous versions of the event (except the redacted ones obviously).

(menu option look)

(pop-up menu)

(aspect when hovering a version)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[Just-Insane]

Hey! The Sable project has moved to a new home at https://github.com/SableClient/Sable. Development will continue there going forward.

Could you please re-open this PR against SableClient/Sable? The dev branch is the right base. Thank you for the contribution — we'd love to have it in the new repo!