[Keyboard] Improvements for the Torn keyboard (#11268)

* Add bongo cat animation

* Map all keys on base layer

... to make it easier to test newly built keyboards. The encoders
are optional and can be placed in different locations.

* Fix Torn in QMK configurator

This removes additional variables defined in the keymap.c file, so
that the default firmware can be compiled by the configurator.

Co-authored-by: Richard Titmuss <richardt@spotify.com>

keyboards/torn/rules.mk

@@ -18,10 +18,12 @@ BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 ENCODER_ENABLE = yes        # Enable rotary encoder
 OLED_DRIVER_ENABLE = yes
+WPM_ENABLE = yes
 CUSTOM_MATRIX = lite
 
 SRC += matrix.c \
+    bongocat.c \
     mcp23018.c \
-    torn_encoder.c \
-    torn_oled.c
+    torn_encoder.c
+
 QUANTUM_LIB_SRC += i2c_master.c