Faces 5.0: we need to move vdldoc and renderkitdoc from Mojarra project into Faces project

[BalusC]

Brought up in jakartaee/faces#1874

I think we need to move at least the following files into API project:

• src/main/resources/com/sun/faces/metadata/taglib/*.taglib.xml as they contribute to vdldoc
• src/main/resources/com/sun/faces/standard-html-renderkit.xml as it contributes to renderkitdoc

Then there's also the jsdoc. This is currently still tight coupled with Mojarra. We need to look closer at that.

[BalusC]

I want to do this asap. But first all pending PRs touching taglib/renderkit files need to be merged otherwise it will be hell with merge conflicts.

• #5325
• #5490
• #5494
• #5498