Task/trackball camera

[marsp0]

replacing the wasd camera with arcball

[codecov]

Codecov Report

Attention: Patch coverage is 30.81761% with 110 lines in your changes missing coverage. Please review.

Project coverage is 69.06%. Comparing base (ebb91e9) to head (28881f6).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/camera.c	33.73%	55 Missing ⚠️
src/linux/input.c	0.00%	33 Missing ⚠️
src/math.c	70.37%	8 Missing ⚠️
src/linux/display.c	0.00%	6 Missing ⚠️
src/renderer.c	0.00%	5 Missing ⚠️
src/shader.c	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #52      +/-   ##
==========================================
- Coverage   69.65%   69.06%   -0.60%     
==========================================
  Files          20       19       -1     
  Lines        1585     1545      -40     
  Branches      143      137       -6     
==========================================
- Hits         1104     1067      -37     
- Misses        466      470       +4     
+ Partials       15        8       -7     

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