New precompiled firmware

Now RP2040 Helios compatible precompiled firmware for Lagom builds is available too.

UF2 files are for RP2040 compatible chips that share a pinout with the Helios. HEX files are for 'traditional' Atmel Pro Micro chips.

• sthlmkb_lagom_vial-wpmhud supports vial and and has a WPM graph on the OLED
• sthlmkb_lagom_vial-bongocat now has vial support and has a bongocat on the OLED