Load and initialise multiple MCAP files via UI

[luluiz]

User-Facing Changes

Description
Transferred initialisation of multi MCAP files from PoC into story branch.
This PR has no unit tests because there is another ticket just to implement the tests. This is done just to unblock the others sub-tasks of the story.

Checklist

• The web version was tested and it is running ok
• The desktop version was tested and it is running ok
• This change is covered by unit tests
• Files constants.ts, types.ts and *.style.ts have been checked and relevant code snippets have been relocated

[sonarqubecloud]

Quality Gate failed

Failed conditions
1.1% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud