* update examples with difficulty stars

* manual fix script issues

* manual fix script issues

Not working but shader compiles and example runs... not sure if deferred rendering could be supported in OpenGL ES 2.0.

Fixed: g-buffer textures binding
Fixed: Clearing screen with white would leak onto g-buffer textures
Reviewed comments

This fixes an incomplete framebuffer issue due to the use of a texture format not supported in ES 3.
This commit also adds more information on how to manage deferred rendering.

* basic pbr example

pbr implementation  includes rpbr.h and few shader files header only file, which self contain everything needed for pbr rendering. Few textures and one model of the car which is under free licence which is included inside basic_pbr.c example file  currently supported shader versions are 120 and 330 , version 100 has small issue which I have to resolve

* Unloading PBRMAterial

I forgot unloading PBRMaterial

* fix small issue with texOffset assigment.

value was Vector4 at first but I found out it would be unclear for and users, so I change to have two Vector2 instead, but forgot to assign offset .

* Changed size of textures and file name changed

Changed size of textures from 2048x2048 to 1024x1024 and file name changed to shaders_basic_pbr.c ,
Added the function PBRModel PBRModelLoadFromMesh(Mesh mesh);
but GenMeshPlane(2, 2.0, 3, 3) culdn't be used because it crash once GenMeshTangents() is used with that plane mesh

* Update to 5.5 version  of eexample and fix to work in web

set GLSL_VERSION            100

set precision highp float;
removed in keyword
fix for loop has to use only constant

* Update shader_basic_pbr example to work on web

changed to GLSL_VERSION            100
update glsl100 shader
set float  precision  to highp
removed keyword  in
change for loop tu use constant value  gives an error

* Update shader_basic_pbr example to work on web

changed to GLSL_VERSION            100
update glsl100 shader
set float  precision  to highp
removed keyword  in
change for loop tu use constant value  gives an error

* removed rpbr.h

removed rpbr.h

* Create raymarching.fs

* Update raymarching.fs

* Update raymarching.fs

* Update raymarching.fs

Remove `fragColor` as it is unused

Move the license to the top of the code to improve readability.

* shaders-vertex_displacement init

* implement simulation of wave in ocean

* update examples/README & add some comments

* update comments

* add gl100 shaders

* Update pbr.fs

remove presicion mediump float because it is for GLES, and not desktop GL

* Fix shadowmap.fs

also suffers the same problem as pbr.fs

* Update raylib_api.* by CI

* Fix warnings when building examples in MSVC 2022

* fix auto-format that sneaked in there.

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

fragPosition was multiplied by mvp*instanceTransform, but it should only be multiplied by instanceTransform. Compare to lighting.vs, there we only use mvp for gl_Position, but matModel for the fragPosition.

* Fix several non-functional `target_compile_definitions`

* Avoid hardcoding the default vertex attribute locations

* Implement functional `rlNormal3f`

* Add normal definitions for `DrawCube`

* Update the basic lighting example to use `DrawCube` and `DrawPlane`

Fix typo