[Keyboard] Waterfowl keyboard support (#16760)

* Added waterfowl files

* Completing PR Checklist

* Added encoders to info.json

* Added license to default keymap

* Update keyboards/waterfowl/keymaps/cyanduck/keymap.c

* Update keyboards/waterfowl/keymaps/default/keymap.c

* Update keyboards/waterfowl/waterfowl.c

* Update keyboards/waterfowl/keymaps/default/keymap.c

* Update keyboards/waterfowl/waterfowl.c

* Update keyboards/waterfowl/waterfowl.c

* Update keyboards/waterfowl/keymaps/cyanduck/keymap.c

* Update keyboards/waterfowl/rules.mk

* Update readme.md

* Update keyboards/waterfowl/waterfowl.c

* Update keyboards/waterfowl/info.json

* Update keyboards/waterfowl/info.json

keyboards/waterfowl/rules.mk

@@ -0,0 +1,23 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
+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
+NKRO_ENABLE = yes           # Enable N-Key Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+AUDIO_ENABLE = no           # Audio output
+
+OLED_ENABLE = yes        # Enables the use of OLED displays
+OLED_DRIVER = SSD1306    # Specifies the type of OLED
+SPLIT_KEYBOARD = yes     # Enables split functionality
+ENCODER_ENABLE = yes	 # Enables the encoders