feat(macos): allow to disable system tray menu on left click, closes #317

[amrbashir]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

[wusyong]

I think I mentioned that default tray supports both clicks too.
If we really want to specify certain behaviour, I guess we expose a method for extension trait.

[amrbashir]

A lot of users asked for this behaviour, check the linked issue and this one tauri-apps/tauri#4002 and some on discord too.

[wusyong]

I know, but as I stated in #317 even official trays works on both or even just left click.
Supporting both clicks is the sensible default. User won't get confused on first try.
If we really want to specify only one kind of click, it should be a extension trait method IMHO.

[amrbashir]

Alright, a trait extension sounds good.

[amrbashir]

I attempted to make it as a trait extension but becaue of my lack of macOS development skill, I couldn't finish it. @wusyong whenever you have some time, could u look into this? I added a TODO where the value should be read.