* Improved billboards example, highlighting rotation and draw order

* changes to conform to the raylib conventions

* NOW it conforms

Co-authored-by: nobytesgiven <nobytesgiven@users.noreply.github.com>

fixing typo

Co-authored-by: nobytesgiven <nobytesgiven@users.noreply.github.com>

* Added Box and Gaussian blurring

* Removed dependence of gaussian blur to box blur & Fixed precision errors

Co-authored-by: nobytesgiven <nobytesgiven@users.noreply.github.com>

All fresh and current.

* Fixed bezier line breaking #2735

* converted tabs to spaces

* typo

* Changed doubles to floats

* removed heap allocations\

Co-authored-by: nobytesgiven <nobytesgiven@users.noreply.github.com>

* build.zig: let user decide how to set build mode

This should delegate the responsibility of calling `standardReleaseOptions` and setting the build mode of the `*LibExeObjStep` step to the caller, especially since this might not be the process by which one wants to determine the build mode.

Also changes hides `getSrcDir` to enforce usage of `srcdir`, and asserts that the file is in fact inside a directory.

* build.zig: set root_src param to `null`

Supplying the header file as the root source here appears to cause a linker warning of the form:
```
LLD Link... warning(link): unexpected LLD stderr:
ld.lld: warning: {build_root}/zig-cache/o/{hash}/libraylib.a: archive member '{build_root}/zig-cache/o/{hash}/raylib.o' is neither ET_REL nor LLVM bitcode
```
Passing `null` instead fixes it.

* parser: Fail gracefully if a nonexistent file is passed on the command line

Before, if a nonexistent file was passed to LoadFileText(), it would
return NULL, and the parser would happily dereference it.

* parser: Refactor Makefile and update the path to easings.h (now reasings.h)

Before, the `make all` target would simply segfault, see 0a679d79
Now, if a file in the `make all` target doesn't exist, make will write
an error.

Individual API files can be generated likeso, provided the header file
the target depends on exists:

FORMAT=JSON EXTENSION=json make raygui_api.json

In order for the `make all` target to succeed, raygui.h, physac.h and
rmem.h need to be added to the correct directory.

* Add DrawCapsule & DrawCapsuleWires

* Add DrawCapsule & DrawCapsuleWires to example

Co-authored-by: Ian Band <ian.r.band@gmail.com>

[raylib-umka](https://github.com/robloach/raylib-umka) provides [Umka scripting language](https://github.com/vtereshkov/umka-lang) bindings to raylib.

* Use RL_QUADS/RL_TRIANGLES for single-pixel drawing

Addresses problem mentioned in
https://github.com/raysan5/raylib/issues/2744#issuecomment-1273568263
(in short: when drawing pixels using DrawPixel{,V} in camera mode,
upscaled pixel becomes a line instead of bigger pixel)

* [rtextures] Fixed scaling down in ImageTextEx

Closes #2755

Probably useless but interesting for education. It generated a grayscale image directly from text data.

and make version check be only 150 not over 150

Addresses problem mentioned in
https://github.com/raysan5/raylib/issues/2744#issuecomment-1273568263
(in short: when drawing pixels using DrawPixel{,V} in camera mode,
upscaled pixel becomes a line instead of bigger pixel)

Fix for #2714

* removed glfwSetWindowPos on InitWindow

* removed execute permission from CMakeLists

* fix issue #2728

* updated gamecontrollerdb: fixes GLFW warning due to invalid entry