[Keymap] Switch Quefrency keymap from I2C back to serial; factor common configs into userspace (#5951)

* Switch Quefrency from flaky I2C back to serial

* Lower mouse wheel speed on Quefrency slightly

* Migrate common settings to userspace

* Enable Bootmagic Lite for consistent reset to bootloader.

* Turn off some undesired features across all keyboards.

* Remove EEPROM reset keybinding from all keyboards since Bootmagic Lite
also does an EEPROM reset.

* Set backlight and underglow increments consistently across all
keyboards since lots of them like to override the deafults.

* Set mouse keys consistently across all keyboards.

* Update function layer keymap images

users/bcat/config.h

@@ -0,0 +1,31 @@
+/* Turn off RGB lighting when the host goes to sleep. */
+#define RGBLIGHT_SLEEP
+
+/* Keep backlight and RGB level increments consistent across keyboards. */
+#undef BACKLIGHT_LEVELS
+#undef RGBLIGHT_HUE_STEP
+#undef RGBLIGHT_SAT_STEP
+#undef RGBLIGHT_VAL_STEP
+
+#define BACKLIGHT_LEVELS 7
+#define RGVLIGHT_HUE_STEP 8
+#define RGVLIGHT_SAT_STEP 17
+#define RGVLIGHT_VAL_STEP 17
+
+/* Make mouse operation smoother. */
+#undef MOUSEKEY_DELAY
+#undef MOUSEKEY_INTERVAL
+
+#define MOUSEKEY_DELAY 0
+#define MOUSEKEY_INTERVAL 16
+
+/* Lower mouse speed to adjust for reduced MOUSEKEY_INTERVAL. */
+#undef MOUSEKEY_MAX_SPEED
+#undef MOUSEKEY_TIME_TO_MAX
+#undef MOUSEKEY_WHEEL_MAX_SPEED
+#undef MOUSEKEY_WHEEL_TIME_TO_MAX
+
+#define MOUSEKEY_MAX_SPEED 7
+#define MOUSEKEY_TIME_TO_MAX 150
+#define MOUSEKEY_WHEEL_MAX_SPEED 3
+#define MOUSEKEY_WHEEL_TIME_TO_MAX 150

users/bcat/rules.mk

@@ -0,0 +1,11 @@
+# Enable Bootmagic Lite to consistently reset to bootloader and clear EEPROM.
+BOOTMAGIC_ENABLE = lite
+
+# Enable mouse and media keys on all keyboards.
+MOUSEKEY_ENABLE = yes
+EXTRAKEY_ENABLE = yes
+
+# Disable some unwanted features on all keyboards.
+CONSOLE_ENABLE = no
+COMMAND_ENABLE = no
+NKRO_ENABLE = no