Remove `Contacts` and `Work` tabs from `Home` page

[SleepySquash]

Resolves #800

Synopsis

Contacts and work tabs should be removed. Instead, a link tab should be added.

Solution

This PR does exactly that: removes the tabs (only the building of it, not the whole code) and adds a new tab instead.

Checklist

• Created PR:
  • [x] In draft mode
  • [x] Name contains issue reference
  • [x] Has type and k:: labels applied
• Before review:
  • [x] Documentation is updated (if required)
  • [x] Tests are updated (if required)
  • [x] Changes conform code style
  • [x] CHANGELOG entry is added (if required)
  • [x] FCM (final commit message) is posted or updated
  • [x] Draft mode is removed
• [x] Review is completed and changes are approved
  • [x] FCM (final commit message) is approved
• Before merge:
  • [x] Milestone is set
  • [x] PR's name and description are correct and up-to-date
  • [x] All temporary labels are removed

[SleepySquash]

FCM

Remove `Contacts` and `Work` tabs from `Home` page (#1012, #800)

- add `Link` tab displaying `DirectLinkField`
- comment out `Contact` related E2E tests
- remove add/remove `Contact` buttons from `User` page

Additionally:
- add `UnknownPage` for 404 routes
- fix `HiveRxChat.get` causing deadlock when `DriftPageProvider.around` is executing
- redesign `ChatDirectLinkView`
- remove `ProfileTab.sections`
- refactor `LinkParsingExtension` to open `Config.link` links within `router`