Add a UI to let users share their servers to other users and groups (#438)

* Adding a UI to create and revoke shares to users and groups

* Fixing named server trailing slash issue and typo

* Improving scopes checking, adding server management scope

* Fix GET users list with pagination

* Fix serverName and serverOwner values

* Fix getOption() position and Hub detection

* Fix css class names, formatting and parsing issue

* Applying linter suggestions

* Displaying 'Group (name)' instead of '(name)' in search results for groups

* Add typing, rename `_users` to `_recipients`, add `_` to privates,

remove unused `await`

* Do not use raw HTML for insertion of unsanitized code (XSS)

* Add a test

* Add snapshot

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Co-authored-by: krassowski <5832902+krassowski@users.noreply.github.com>

Author: Hyrla