[rlgl][rmodels][rshapes] Add support for GL_POINTS

[maiconpintoabreu]

Add support RL_POINTS/GL_POINTS to be able to use DrawPoint3D.
The extra code is to add the alignment and the buffer size check.

With RL_POINTS (Works on Web)

With without RL_POINTS

[raysan5]

@maiconpintoabreu this is a big change that I'm afraid should wait until raylib 6.0 release to be considered

[maiconpintoabreu]

@maiconpintoabreu this is a big change that I'm afraid should wait until raylib 6.0 release to be considered

Sure, no problem, do you want me to close it and open again later on?

[raysan5]

do you want me to close it and open again later on?

No, no, it's ok to have some issues/PRs open for the future 😄

[maiconpintoabreu]

Testing RL_POINTS particle system compared with current implementation.

Screencast.from.2026-03-27.08-56-22.webm

Current Implementation:

With RL_POINTS