Format and document utility files (#246)

* Format and document utility files

* Add Doxyfile

* small updates for cleanup

* Final touches for util docs

* Replace `_` with `s_` for static functions

* update for clang-format changes

* Update include/audio_utils.h

Co-authored-by: MeirGavish <meir.gavish@gmail.com>

* Apply suggestions from code review

Co-authored-by: MeirGavish <meir.gavish@gmail.com>

* Update include/audio_utils.h

Co-authored-by: MeirGavish <meir.gavish@gmail.com>

* Update include/graphic_utils.h

Co-authored-by: MeirGavish <meir.gavish@gmail.com>

* Make clang-format happy :)

* Update gitignore for doxygen

* restor graphic_utils.c to main

* update graphics utils

* tmp

* tmp

* get it to compile

* fix some bad merge mistakes

* Fix clang format

* Apply suggestions from code review

Co-authored-by: MeirGavish <meir.gavish@gmail.com>

* make clang-format happy

---------

Co-authored-by: MeirGavish <meir.gavish@gmail.com>

.gitignore

@@ -1,11 +1,12 @@
-/.vscode
-/build
-/.vs
-*.sln
-*.vcxproj*
-/balatro-gba/x64/**
-/tests/bitset/build
-/tests/list/build
-/tests/pool/build
-tests/util/.vscode
-tests/util/build
+/.vscode
+/build
+/.vs
+*.sln
+*.vcxproj*
+/balatro-gba/x64/**
+/tests/bitset/build
+/tests/list/build
+/tests/pool/build
+doc
+tests/util/.vscode
+tests/util/build