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/window/title-bar/WindowButtonsWeb.vue

@@ -1,5 +1,5 @@
 <template>
-	<LayoutRow class="window-buttons-web" @click="() => handleClick()" :title="fullscreen.state.windowFullscreen ? 'Exit Fullscreen (F11)' : 'Enter Fullscreen (F11)'">
+	<LayoutRow class="window-buttons-web" @click="() => handleClick()" :title="(fullscreen.state.windowFullscreen ? 'Exit' : 'Enter') + ' Fullscreen (F11)'">
 		<TextLabel v-if="requestFullscreenHotkeys" :italic="true">Go fullscreen to access all hotkeys</TextLabel>
 		<IconLabel :icon="fullscreen.state.windowFullscreen ? 'FullscreenExit' : 'FullscreenEnter'" />
 	</LayoutRow>