Input refactoring (#12)

* Fix folder name typo

* Smaller fixes

* Shortcut rename to Shortcuts

* Fix quoted attributes in UE 5.3

* remove KeyboardShortcutAction

* Remove more trivial classes

* Rename IKeyboardShortcut

* Node delete shortcut

js/action/RemoveAllNodes.js

@@ -0,0 +1,8 @@
+import Action from "./Actions"
+
+export default class RemoveAllNodes extends Action {
+
+    fire() {
+        this.blueprint.removeGraphElement(...this.blueprint.getNodes(true))
+    }
+}