Add timezone to user profile

[Half-Shot]

Implements MSC4175
Depends on matrix-org/matrix-js-sdk#4391

Design provided at https://www.figma.com/design/gpxHFDTNK796n84r1ZxYG2?node-id=1360-28954#941702635

This provides a basic presentation of a user's current time & timezone on their profile. It also adds a setting to allow publishing the time.

Timezone in user profile

Timezone publish setting

Checklist

• Tests written for new code (and old code if feasible).
• New or updated public/exported symbols have accurate TSDoc documentation.
• Linter and other CI checks pass.
• Sign-off given on the changes (see CONTRIBUTING.md).

[Half-Shot]

@daniellekirkwood tagged as discussed. I think this just needs some thoughts about how best to fit it into the profile view. I'm happy to wait if existing designs are in the process of landing, I can just rebase.

[daniellekirkwood]

Thanks!

[dbkr]

Otherwise looks good! I think your disable-line needs to be on the preceding line.

[dbkr]

Updating feels like it might be overkill here, especially since it doesn't look like there's any UI to suggest it's dynamically refreshing, but seems fine I guess.

[Half-Shot]

It just felt weird to me that the time would slowly drift out of date if you left the user open for a minute. I suppose it's an incredibly minor thing, but also I don't think it's a costly rerender.

[Half-Shot]

Closing in favor of element-hq/matrix-react-sdk#20