feat(behaviors): Add DEL/BSPC to continue list.

* Continue caps word on delete/backspace by
  default now.

Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>

app/dts/behaviors/caps_word.dtsi

@@ -12,7 +12,7 @@
 			compatible = "zmk,behavior-caps-word";
 			label = "CAPS_WORD";
 			#binding-cells = <0>;
-			continue-list = <UNDERSCORE>;
+			continue-list = <UNDERSCORE BACKSPACE DELETE>;
 		};
 	};
 };

docs/docs/behaviors/caps-word.md

@@ -23,8 +23,7 @@ Example:
 
 #### Continue List
 
-By default, the caps word will remain active when any alphanumeric character or the underscore (`UNDERSCORE`) characters are pressed. Any other keycode sent,
-will turn off caps word. If you would like to override this, you can set a new array of keys in the `continue-list` property in your keymap:
+By default, the caps word will remain active when any alphanumeric character or underscore (`UNDERSCORE`), backspace (`BACKSPACE`), or delete (`DELETE`) characters are pressed. Any other non-modifier keycode sent will turn off caps word. If you would like to override this, you can set a new array of keys in the `continue-list` property in your keymap:
 
 ```
 &caps_word {