Is now possible to switch platform

Is now possible to diable raudio, rmodels, and so on

Made getOptions public so it can be used for zig wrappers

function

- addRaylib just duplicates what adding raylib as dependency already does
  so it do not needs to exist
- move raygui build to standard build process when flag is enabled. this
  works correctly when using raylib as dependency and having raygui as
  dependency as well. problem with previous approach was that raygui was in
  options but it was doing nothing because you had to also use addRaygui for
  it to be effective

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

- Add xcode_frameworks when cross compiling for mac (ref:
https://github.com/hexops/mach/blob/main/build.zig)
- Add emsdk when cross compiling for wasm (ref:
https://github.com/floooh/sokol-zig/blob/master/build.zig)

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

* build.zig: Move `src/build.zig` to `build.zig`

* build.zig: Remove uses of `@src`

* build.zig: Update entry point

* build.zig: Fix `@src` logic

* build.zig: Clarify build error

* build.zig: Add option for enabling `raygui`

* build.zig: Expose `Options` type

* Remove support for 0.11.0, and make build script more idiomatic
+ remove all 0.11.0 compatibility functions
+ remove most LazyPath .path variants
  + I didn't touch emscripten, I don't know if its relative or absolute
+ change all absolute paths to use .cwd_relative
+ only use the builder allocator
+ have local dependencies use the package manager
+ make adding raygui more flexible
+ use zig-cache for generated wayland files

* Remove support for 0.11.0 in examples/build.zig

* update examples further and add clarifying comment on addRaygui

* fix local dependency breakage

* revert accidental change in include path

* update build.zig to 0.12.0-dev.2139 and add shared lib option

* add no-sanitize workarounds

* update build.zig for latest zig 0.12.0dev while still allowing 0.11.0

* update examples/build.zig and add nicer message for type mismatch

This reverts commit 540ad99442.

* update build.zig for zig 0.11.0

* fix build.zig in examples to install executable correctly

* discard build.zig, only use src/build.zig, to avoid annoying zig-out path problem

* update zig version note

* Revert "Fixed broken build.zig files. Now works with latest stable compiler (as of commit, latest is 0.10.1) (#3045)"

This reverts commit de748dfffe so that zig
build script works with master branch of zig.

* Added a note to build.zig files that denotes what version of zig they have been tested with.

* Standardised the note in the build.zig files

Co-authored-by: Talha Qamar <qamartalha@proton.me>

also, adds package manager support