* Moved SwapOnly opcode message to cover "unused" case
* Adjusted Size switch statement to account for non standard sizes
* Fixed InsertRow opcode insertion index
* Corrected RemoveRow opcode to ensure removal didn't skip keys
* Small formatting and style fixes
* Insert Row OPCODE requires a row taken from the provided key
* Insert Row will insert provided key if the row insert was successful.
* Provide "UNUSED" key for an empty row insert.
* Added new KEYBOARD_OPCODE enum
* Updated `keyboard_leds` to include new opcode
* Reorganised InsertKeys and SwapKeys to work with struct change
* Changed public interfaces to only accept opcode changes
* Updated static keyboard declarations to align with new structures
