Update contributing

[AlexPerathoner]

Fix #54

[github-actions[bot]]

Testing project SlimHUD with scheme SlimHUD

Summary

Total	Passed	Failed	Skipped	Expected Failure	:stopwatch: Time
7	7	0	0	0	0.00s

---

Test Summary

SlimHUDTests

• Device: Mac, 12.6.2 (21G320)
• SDK: macOS 13.1, 13.1

  Test	Total
  PositionManagerTests	7	7	0	0	0

  ---

  Failures

  All tests passed :tada:

  ---

  Code Coverage

  	Coverage		Covered	Executable
  SlimHUD.app		28.99 %	536	1849
  PositionManager.swift		96.23 %	102	106
  NSControlExtension.swift		0.00 %	0	6
  NSSegmentedControlExtension.swift		0.00 %	0	10
  AppleScriptRunner.swift		73.33 %	11	15
  UserDefaultsManager.swift		76.74 %	33	43
  Hud.swift		14.71 %	20	136
  AboutViewController.swift		0.00 %	0	23
  Displayer.swift		64.44 %	116	180
  DisplayManager.swift		45.67 %	58	127
  SettingsWindowController.swift		0.00 %	0	34
  KeyboardManager.swift		0.00 %	0	61
  SettingsManager.swift		28.89 %	39	135
  BaseView.swift		68.97 %	20	29
  VolumeManager.swift		47.62 %	10	21
  ChangesObserver.swift		15.22 %	21	138
  OSDUIManager.swift		0.00 %	0	18
  NSViewExtension.swift		47.06 %	24	51
  Alert.swift		0.00 %	0	10
  SettingsViewController+General.swift		0.00 %	0	24
  UserDefaultsExtension.swift		100.00 %	3	3
  AboutWindowController.swift		0.00 %	0	7
  LoginItemList.swift		0.00 %	0	91
  AppDelegate.swift		36.59 %	45	123
  KeyPressObserver.swift		21.43 %	6	28
  ProgressBar.swift		70.00 %	21	30
  SettingsViewController.swift		0.00 %	0	92
  SettingsViewController+Position.swift		0.00 %	0	27
  BarView.swift		63.64 %	7	11
  NSButtonExtension.swift		0.00 %	0	6
  SinglePopover.swift		0.00 %	0	6
  SettingsViewController+Style.swift		0.00 %	0	99
  BoolExtension.swift		0.00 %	0	11
  SettingsView.swift		0.00 %	0	141
  DeterminateAnimation.swift		0.00 %	0	7
  Total		28.99 %	536	1849

  ---

  Test Details

  SlimHUDTests

  PositionManagerTests 

  				:stopwatch:
  7 (100%)	0 (0%)	0 (0%)	0 (0%)	0.00s

  	testCalculateHudsOriginBottom()
  	testCalculateHudsOriginBottomNoDock()
  	testCalculateHudsOriginLeft()
  	testCalculateHudsOriginLeftNoDock()
  	testCalculateHudsOriginRight()
  	testCalculateHudsOriginRightNoDock()
  	testCalculateHudsOriginTopWithAndWithoutDock()