add firmware

firmware/main/Kconfig.projbuild

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+menu "Candytuft Pin Mapping"
+	menu "Inputs"
+		config PIN_WHEEL_A
+			int "Rotary encoder pin A"
+			range 0 39
+			default 21
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to pin A of the rotary encoder.
+		
+		config PIN_WHEEL_B
+			int "Rotary encoder pin B"
+			range 0 39
+			default 22
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to pin B of the rotary encoder.
+
+		config KEY_FORWARD
+			int "Front Panel Forward Key Mapping"
+			range 0 39
+			default 4
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to the Forward key.
+
+		config KEY_BACKSPACE
+			int "Front Panel Backspace Key Mapping"
+			range 0 39
+			default 13
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to the Backspace key.
+
+		config KEY_DONE
+			int "Front Panel Done Key Mapping"
+			range 0 39
+			default 14
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to the Done key.
+
+		config KEY_CANCEL
+			int "Front Panel Cancel Key Mapping"
+			range 0 39
+			default 18
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to the Cancel key.
+
+		config KEY_OPTION
+			int "Front Panel Option Key Mapping"
+			range 0 39
+			default 19
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to the Option key.
+	endmenu
+
+	menu "LCD"
+		config LCD_SCL
+			int "LCD panel SCL pin mapping"
+			range 0 39
+			default 25
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to the LCD panel's SCL pin.	
+
+		config LCD_SDA
+			int "LCD panel SDA pin mapping"
+			range 0 39
+			default 26
+			help
+				If using a non-standard mainboard, set this value to the GPIO connected to the LCD panel's SDA pin.
+	endmenu
+endmenu