refactor(core): use Icon for tray icons

[lucasfernog]

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

[amrbashir]

IconDto in endpoints/window.rs also need to be updated.

[lucasfernog]

why? I already changed the type and nothing else changed @amrbashir

[amrbashir]

TrayIcon enum that had File and Raw variant removed, thought the js API too will remove it?

[lucasfernog]

TrayIcon enum that had File and Raw variant removed, thought the js API too will remove it?

We also had those variants for window icons, at runtime we read the icon and get a rgba vec to use on tao.