GDB pretty-printers were recently added for a couple Godot types.
They make the GDB debugger variable display more readable, so let's
document their existence for developers.
cf. godot/godot#91280
(cherry picked from commit 281bc8399e)
The Introduction to the buildsystem page still mentions this parameter
in case it needs to be changed, but in most situations, the default
value of `(number of CPU threads) - 1` does a good job.
- Merge Community/Contributing and Engine Development into one top-level section, Contributing.
- Structure it in a way that gives equal priority to various ways to contribute, including documentation.
- Rename several articles to be more comprehensive and in line with the overall state of the documentation.
- Rewrite the guide for class reference contributions.
Mitten Orvan