fix: macOS -> replace the tray icon with a dock menu

[shenlebantongying]

• implement Unsatisfactory "Close To Tray" behavior on macOS goldendict/goldendict#1356 (comment)
• close Unable to bring goldendict back from the dock after clicking the red close button on macOS if tray icon is enabled #857
• close Always on dock issue #583
• related [macOS] The close button (❌) is not working as expected, it should actually "hide', as all the Apple's apps do.  #1731
• fix a bug that clicking the tray icon on macOS will bring up both "the tray menu" and the "main window" up (The tray menu showing up is macOS's intrinsic behavior? We don't have any code touches it).

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After this change:

The toggle clipboard monitoring is moved to the dock menu.

To toggling visibility using dock icon: "Click" to bring up and "Option+Click" to hide. Note that "Option+click" may also hide other staffs, a weird shortcut.

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Pretty sure this will break someone's habit, however

• The tray icon has little value on macOS because macOS's dock has the capability of having custom menu items
• Bugs, as in the issues mentioned. They all require macOS specific code that may lock related code in place for future because nobody knows Qt and macOS programming at the same time.

Is there fixes? Yes, but actually no.

(Apple don't use the terminology "tray icons", it is "Menu Extra" BTW. -> from Apple's HIG https://developer.apple.com/design/human-interface-guidelines/the-menu-bar#Menu-bar-extras).

• One fix is TransformProcessType -> kProcessTransformToUIElementApplication & kProcessTransformToForegroundApplication
  • UIElementApplication is app with "MenuExtra" but no "Dock Icon"
  • Apple don't even document it at all https://developer.apple.com/documentation/applicationservices/1462420-transformprocesstype?language=objc
• Another fix is having an extra binary that lives in its own process with type LSUIElement = true.
  • This is the method provided in Apple's sample codes, but that requires reprogram the tray menu that's wildly different from Windows & Linux's code https://developer.apple.com/documentation/swiftui/menubarextra
  • This is probably doable by just invoking the goldendict binary though.

I think this is the best way forward with only downside of breaks some existing users, hopefully they can adapt and hopefully using dock menu isn't hard.

[sonarqubecloud]

Quality Gate passed

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