Update various rendering pages for Godot 4.7

This adds information on reverse Z, color precision when enabling
HDR 2D in Mobile, Metal 4 support and more.

This also fixes broken URLs on the Internal rendering architecture page.
All links have been tested with the `4.6` branch and are functional.
Some links still point to `master`, as the source file they link to
is not present in `4.6`.

Author: Calinou