[Keyboard] New Keyboard - Mercutio (#11214)

* Initial commit on new clean branch. Testing out functionality of oled and encoder for default features.

* Cleaned up the initial push and removed the fancy keymap until the extra features and functionality can be tested and made more user friendly.

* Cleaned up the readme some more, compiled and tested both default and via keymaps, and did another round of checks to prepare for starting the PR.

* Cleaning up the keymap to meet expected formatting in a couple places and also adding in the TAP_CODE_DELAY after newly encoutnered encoder issues and inconsistencies.

* Apply suggestions from code review

Co-authored-by: Joel Challis <git@zvecr.com>

* Update keyboards/mechwild/mercutio/readme.md

Co-authored-by: Ryan <fauxpark@gmail.com>

* Fixing json syntax.

* Update keyboards/mechwild/mercutio/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/mechwild/mercutio/rules.mk

@@ -0,0 +1,24 @@
+# MCU name
+MCU = atmega328p
+
+# Bootloader selection
+BOOTLOADER = USBasp
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+ENCODER_ENABLE = yes
+OLED_DRIVER_ENABLE = yes