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/components/widgets/inputs/MenuBarInput.vue

@@ -101,7 +101,7 @@ export default defineComponent({
 						...entry,
 						children: entry.children ? menuEntryToFrontendMenuEntry(entry.children) : undefined,
 						action: (): void => this.editor.instance.update_layout(updateMenuBarLayout.layout_target, entry.action.widgetId, undefined),
-						shortcutRequiresLock: entry.shortcut ? shortcutRequiresLock(entry.shortcut) : undefined,
+						shortcutRequiresLock: entry.shortcut?.keys ? shortcutRequiresLock(entry.shortcut.keys) : undefined,
 					}))
 				);