Migrate dialogs to Rust and add a New File dialog (#623)

* Migrate coming soon and about dialog to Rust

* Migrate confirm close and close all

* Migrate dialog error

* Improve keyboard navigation throughout UI

* Cleanup and fix panic dialog

* Reduce css spacing to better match old dialogs

* Add new document modal

* Fix crash when generating default name

* Populate rust about graphite data on startup

* Code review changes

* Move one more :focus CSS rule into App.vue

* Add a dialog message and move dialogs

* Split out keyboard input navigation from this branch

* Improvements including simplifying panic dialog code

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/dialog/mod.rs

@@ -0,0 +1,17 @@
+//! Handles dialogs/modals/popups that appear as boxes in the centre of the editor.
+//!
+//! Dialogs are represented as structs that implement the [`crate::layout::widgets::PropertyHolder`] trait.
+//!
+//! To open a dialog, call the function `register_properties` on the dialog struct with `responses` and the `LayoutTarget::DialogDetails`
+//! and then you can open the dialog with [`crate::message_prelude::FrontendMessage::DisplayDialog`]
+
+mod dialog_message;
+mod dialog_message_handler;
+mod dialogs;
+
+pub mod messages {
+	pub use super::dialog_message::{DialogMessage, DialogMessageDiscriminant};
+	pub use super::dialog_message_handler::DialogMessageHandler;
+}
+
+pub use dialogs::*;