[Keyboard] Solanis H87C/H88C Compatible Replacement PCBs (#16942)

Co-authored-by: Ryan <[email protected]>

keyboards/fjlabs/solanis/rules.mk

@@ -0,0 +1,21 @@
+# MCU name
+MCU = at90usb646
+
+# Processor frequency
+F_CPU = 8000000
+
+# 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 = yes        # Commands for debug and configuration
+NKRO_ENABLE = yes           # Enable N-Key Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
+AUDIO_ENABLE = no           # Audio output