v6.1 Boot screen with OpenCO2 logo

What's Changed

• New Squircle Case update by @davidkreidler in #42
• Autogenerate FIRMWARE.BIN by @davidkreidler in #44
• Arduino ESP Version update 3.3.5 and 80 MHz by @davidkreidler in #46
• New boot screen with OpenCO2 logo by @davidkreidler in #49

Full Changelog: v6.000...v6.1