Add tooltips to project export buttons

[JUSTCAMH]

Describe the project you are working on

Anything

Describe the problem or limitation you are having in your project

When exporting a project from Project > Export, the user is shown three buttons at the bottom for exporting, namely Export All, Export Project and Export PCK/ZIP. Of these buttons, it's difficult for a beginner to know what the difference is and which one is needed. I would've guessed I needed to Export Project, however this did not do what I expected.

You can read docs, but even these are vague about the differences between these buttons (perhaps docs also need further details?) https://docs.godotengine.org/en/stable/tutorials/export/exporting_projects.html

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Currently, only the Export All button has a tooltip when hovered, this is helpful for explaining what the button does. Add tooltips for the other two export buttons to explain what these do.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

Tooltips are used around the editor so users are familiar with hovering for a second over something to see more info. However this is unavailable for the Export Project and Export PCK/ZIP buttons, despite their names not clearly indicating their use.

If this enhancement will not be used often, can it be worked around with a few lines of script?

No, and would be used frequently

Is there a reason why this should be core and not an add-on in the asset library?

Exporting projects is core