Add encoder defaults for Keebio boards (#16398)

* Add BDN9 encoder defaults

* Add DSP40 encoder default

* Add FoldKB encoder defaults

* Add Iris encoder defaults

* Update Iris Rev. 6 encoder orientation

* Add KBO-5000 encoder defaults

* Add Quefrency encoder defaults

* Add Sinc encoder defaults

* Add Stick encoder defaults

* Remove encoder settings from VIA keymaps

keyboards/keebio/sinc/keymaps/default/keymap.c

@@ -33,5 +33,5 @@ bool encoder_update_user(uint8_t index, bool clockwise) {
             tap_code(KC_VOLD);
         }
     }
-    return true;
+    return false;
 }