refactor(app): Replace `HID_EXT_USAGE` with `HID_USAGE`

Simplifies terminology and improves readability.

app/include/dt-bindings/zmk/hid_usage_pages.h

@@ -10,9 +10,9 @@
 
 #pragma once
 
-#define HID_EXT_USAGE(page, id) ((page << 16) | id)
-#define HID_EXT_USAGE_ID(ext) (ext & 0xFFFF)
-#define HID_EXT_USAGE_PAGE(ext) (ext >> 16)
+#define HID_USAGE(page, id) ((page << 16) | id)
+#define HID_USAGE_ID(usage) (usage & 0xFFFF)
+#define HID_USAGE_PAGE(usage) (usage >> 16)
 
 /* WARNING: DEPRECATED from dt-bindings/zmk/keys.h */
 #define USAGE_KEYPAD (0x07)   // WARNING: DEPRECATED (DO NOT USE)

app/include/zmk/events/keycode-state-changed.h

@@ -24,8 +24,8 @@ ZMK_EVENT_DECLARE(keycode_state_changed);
 
 static inline struct keycode_state_changed *keycode_state_changed_from_encoded(u32_t encoded,
                                                                                bool pressed) {
-    u16_t page = HID_EXT_USAGE_PAGE(encoded) & 0xFF;
-    u16_t id = HID_EXT_USAGE_ID(encoded);
+    u16_t page = HID_USAGE_PAGE(encoded) & 0xFF;
+    u16_t id = HID_USAGE_ID(encoded);
     zmk_mod_flags implicit_mods = SELECT_MODS(encoded);
 
     if (!page) {