🔨(frontend) encapsulate title component

[rvveber]

In order to modularize and simplify customizations to components,
the title component is encapsulated.

closes #406

[AntoLC]

Very small changes.

I don't understand how this PR can close the issue #406, could you explain ?

[rvveber]

Very small changes.

I don't understand how this PR can close the issue #406, could you explain ?

I originally created #406 due to the openDesks integration requiring a "central menu" in the header.
(The issue's title was later updated to "make toolbar customizable.")

However, since the requested change was too specific for this project and we aim to keep it generic, a more sophisticated solution would have been needed—something along the lines of: matrix-org/matrix-react-sdk-module-api.

Unfortunately, I lacked the time and experience to implement such a large-scale task, which would also require extensive testing and user documentation.

Instead, i decided to override a single component (a single file) at build time, independent of this project. To maximize compatibility with future versions of Docs, I chose to override a very simple component that was already positioned where needed, which led to encapsulating the Title to its own file.

It's a generic change for Docs, but a very helpful one for openDesk's desired override.