Add full support for Mac-specific keyboard layouts (#736)

* IPP for Mac, flawed initial experiments

* Cleanup and progress, but not compiling yet

* Fix error and rename nonmac -> standard

* Extentd ipp macros to accomodate mac input

* Add Mac versions of shortcuts; refactor and document the input mapper macros

* Change frontend styling for user input labels in floating menus

* Additional macro documentation

* A little more documentation

* Improve entry macro syntax

* Move input mapper macros to a separate file

* Adapt the keyboard shortcuts to the user's OS

* Display keyboard shortcuts in the menu bar based on OS

* Change Input Mapper macro syntax from {} to ()

* Fix esc key bug in Vue

* Tweaks

* Interim solution for Mac-specific hints

* Feed tooltip input hotkeys from their actions

* Fix hotkeys for tools because of missing actions

* Make Vue respect Ctrl/Cmd differences per platform

* Remove commented lines

* Code review pass by me

* Code review suggestions with TrueDoctor

* Turn FutureKeyMapping struct into ActionKeys enum which is a bit cleaner

* Add serde derive attributes for message discriminants

* Re-add serde deserialize

* Fix not mutating ActionKeys conversion; remove custom serializer

* Add serde to dev dependencies

Co-authored-by: Dennis <dennis@kobert.dev>

frontend/src/main.ts

@@ -14,10 +14,8 @@ import App from "@/App.vue";
 		const body = document.body;
 		const message = stripIndents`
 			<style>
-			h2, p, a {
-				text-align: center;
-				color: white;
-			}
+			h2, p, a { text-align: center; color: white; }
+			#app { display: none; }
 			</style>
 			<h2>This browser is too old</h2>
 			<p>Please upgrade to a modern web browser such as the latest Firefox, Chrome, Edge, or Safari version 15 or newer.</p>