Introduce a project information popup that display a full project title, its abstract metada and author

[nirvn]

First, a screencast:

Screencast.From.2026-05-30.12-24-13.mp4

This PR introduces a simple project information popup that display a given project's full title, description and author. The popup can be accessed via the side dashboard and lives right next to the newly-introduced project title label.

The title, description and author values are taken from the project metadata first. If a given value is empty and the current project is a cloud project, QField will seek the relevant information from the cloud project information (i.e. project name, description, and owner).

This elevates both the usefulness of project metadata (editable in QGIS) as well as QFieldCloud project details, which provides additional motivation to fill in a nice description there :)

Behind the scene, we're recycling the layer notes popup and generalize its purpose to displaying information, so we're not adding any "weight" to QField's main scene.

[qfield-fairy]

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