feat(core): globalShortcut API

[lucasfernog]

What kind of change does this PR introduce? (check at least one)

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

Does this PR introduce a breaking change? (check one)

• Yes. Issue #___
• No

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix: #xxx[,#xxx], where "xxx" is the issue number)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:

This PR introduces a global shortcut API. Run the API example to test it out :)

import { registerShortcut, unregisterShortcut } from '@tauri-apps/api/globalShortcut'

registerShortcut('ctrl + shift + a', () => alert('tauri!')).catch(console.error)
registerShortcut('super + T', () => alert('it works'))

unregisterShortcut('super + T').catch(console.error)

• Tested on Linux, macOS, Windows
• This only works because of the wry migration :)

[ken0x0a]

[Question (macOS)]

Are shortcuts, registered using this PR code, appears as MenuItem like this?

[lucasfernog]

We don't have menu support yet but I think we'd need to do it manually.

[ken0x0a]

It seems this is something related to do that for macOS.
https://github.com/ryanmcgrath/cacao/blob/master/src/macos/menu/item.rs

[lucasfernog]

Cool, we'll handle that when WRY supports menus.

[nklayman]

Awesome feature to have! Just a few questions/suggestions.