[NEW] Federation search public rooms in the Matrix network

[MarcosSpessatto]

Proposed changes (including videos or screenshots)

This PR allows the user to search for public rooms and join the room in the Matrix network once the server name and optionally room name are provided.

It also adds the ability to join a local federated room using the already existing join feature. Jira: FED-14

Issue(s)

Steps to test or reproduce

Further comments

[codecov[bot]]

Codecov Report

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