[Keyboard] RGBKB Pan (#9587)

* Add new keyboard Pan

Encoder switches still need work

* New keyboard Pan

Should be complete

* Split MCU selection into 2 revision folders

* [rgbkb/pan] Make requested changes for PR

Additionally, set DEFAULT_FOLDER to rev1, and default rev1
 to atmega32a (as all shipped kits include an atmega32a)

* Apply suggestions from code review

* Fix default keymap typo

* add usb max power define

* Commit suggested changes

* Update keyboards/rgbkb/pan/config.h

* Apply suggestions from code review

Small copyright updates

* Apply suggestions from code review

keyboards/rgbkb/pan/rules.mk

@@ -0,0 +1,25 @@
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no        # 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
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+RGB_MATRIX_ENABLE = WS2812
+WS2812_DRIVER = bitbang
+ENCODER_ENABLE = yes
+OLED_DRIVER_ENABLE = yes
+
+# RGB layout selection
+RGB_ENCODERS = yes # For RGB encoders, solder on both WS2811 chips
+STAGGERED_LAYOUT = no # If you soldered R1-A12 and R4-A12, enable this.
+
+# Default to revision 1
+DEFAULT_FOLDER = rgbkb/pan/rev1