feat: make double tap to hold layer optional per key (#662)

* feat: make double tap to hold layer optional per key

* test: fix test serializer

* fix: remove "application start" text

* Add double-tap.svg

* Add closing dot at the end of the sentence.

* fead: add double-tap icon

* Bundle firmware version 8.3.0

* feat: 'layer-double-tap' feature flag

* feat: convert SwitchLayerMode to string enum

packages/uhk-common/src/models/command-line-args.ts

@@ -7,4 +7,9 @@ export interface CommandLineArgs {
      * simulate privilege escalation error
      */
     spe?: boolean;
+    /**
+     * show 'Lock layer when double tapping this key' checkbox on 'Layer' tab of the config popover
+     * if it false the checkbox invisible and the value of the checkbox = true
+     */
+    layerDoubleTap?: boolean;
 }