[Keyboard] Fix Pulse4k info.json LAYOUT name (#7965)

* Fix Pulse4k info.json LAYOUT name

* Add missing functions to fix configurator

Add empty encoder functions to the keyboard code, as the configurator doesn't see the keymap defined functions at first.
To be able to override these functions, they are marked as 'weak'.

* Rework encoder functions another time

Default implementation is now provided as part of the keyboard, but they can still be overriden within the keymap (template is commented out by default)

keyboards/maxr1998/pulse4k/info.json

@@ -6,7 +6,7 @@
   "width": 3,
   "height": 2,
   "layouts": {
-    "LAYOUT_pulse4k": {
+    "LAYOUT": {
       "key_count": 6,
       "layout": [ 
         { "w": 1, "x": 0, "y": 0 },