2.3.1 BETA Firmware

What's Changed

• Add Nano support by @neilenns in #223
• MF type to flash, simplier check for serial avail. by @elral in #217
• Change constant for averaging buffer size of analog inputs (#211) by @GioCC in #218
• add write block w/o length, renaming read_char by @elral in #222
• faulty init on startup, check for available memory by @elral in #227
• Pico by @elral in #228
• Unique by @elral in #230
• Stepper optimization by @elral in #224
• Include pico firmware in workflows by @neilenns in #234

Full Changelog: 2.2.3...2.3.1