feat: added text support to system tray - macos, closes #65

[BenJeau]

What kind of change does this PR introduce?

• [ ] Bugfix
• [x] 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 #___
• [x] No

Checklist

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

Other information

Here's an example of the change, closes #65

https://user-images.githubusercontent.com/22248828/163900111-fadff001-1de9-42e6-b4d1-1332c0eb2985.mov

As this is my first contribution to tauri, please let me know of anything that needs to be done/changed for this to be accepted to be merged

[patrick91]

this looks very promising, is there any way I can test this in my app? :)

[vojty]

Since I'm waiting for this feature as well I created a new PR https://github.com/tauri-apps/tao/pull/554

The changes are the same as in this PR, I've just moved things to the existing traits as @amrbashir suggested and added support for the builder variant.

[amrbashir]

closing in favor of #554. Thanks @BenJeau and @vojty