Welcome window

[sindresorhus]

There's currently a temporary welcome window:

Plash/Plash/AppDelegate.swift

Lines 103 to 113 in a6aa255

	func showWelcomeScreenIfNeeded() {
	guard App.isFirstLaunch else {
	return
	}
	NSApp.activate(ignoringOtherApps: true)
	NSAlert.showModal(
	message: "Welcome to Plash!",
	informativeText: "Plash lives in the menu bar (droplet icon). Click it and then select “Open URL…” to get started.\n\nIf you have any feedback, bug reports, or feature requests, kindly use the “Send Feedback” button in the Plash menu. We respond to all submissions and reported issues will be dealt with swiftly. It's preferable that you report bugs this way rather than as an App Store review, since the App Store will not allow us to contact you for more information."
	)
	}

But it would be nice to have a better looking welcome window made in SwiftUI.