Add setting to enable 24-hour time format

[agmm]

Description

Support for the 24-hour time format has been a frequently requested feature in the Cinny Matrix room and has been mentioned in multiple issues: #60, #1333, #1549, #1648. This PR adds a toggle in the settings page that allows the user to switch between 12-hour and 24-hour time formats.

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] 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:

• [x] My code follows the style guidelines of this project
• [x] 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
• [x] My changes generate no new warnings

[github-actions[bot]]

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[LevitatingBusinessMan]

@agmm are you still willing to update this PR?

[agmm]

I totally forgot about this PR, but yes, I am willing to update it. I will take a look as soon as I have the time.

[ajbura]

Closing due to inactivity