Klipper v0.13.0 Firmware Builds

Automated firmware builds for Klipper version v0.13.0

Building firmware for the following boards:
- btt-ebb36-v1.2-can-PB0-PB1-1000000
- ldo-leviathan-can-PB5-PB6-1000000
- BoxTurtle-AFC-Lite-USB
- btt-skr-mini-e3-v3-usb
- btt-skr-pico-usbserial
- btt-skr-mini-e3-v3-UART-PA3-PA2-250000
- btt-skr-pico-UART-GPIO1-GPIO0-250000
- BoxTurtle-AFC-Lite-CAN-PB8_PB9-1000000
- ldo-leviathan-usb
- btt-skr-pico-usb-can-bridge-RX1-TX0-1000000

Each firmware file is named according to its target board.