Add timezone to user profile

[Half-Shot]

Migrated from matrix-org/matrix-react-sdk#12967
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).

Signed-off-by: Will Hunt cla@half-shot.uk

[CLAassistant]

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[Half-Shot]

These changes came from 33c9c04, I don't know whether I should remove them from my commit list to make the CI pass or just ignore it?

[Half-Shot]

@dbkr PR ended up moving here, if you wouldn't mind a re-review (sorry!)

[dbkr]

Looks good. For the end to end tests, you'll just need to run the command to update the screenshot file. For sonarcloud coverage... it's whining because the code to update / delete the timezone is not tested, which feels legit I think. Any chance of a test for this?

[Half-Shot]

@dbkr New tests added and screenshots fixed, I think this is ready for you to look at.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
85.6% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[Half-Shot]

(I have CLA'd, but it seems to think I have not)