fw3.1-harp1.13

What's Changed

• Mechanical update by @artursilva0 in #4
• Add prototype device schema and interface by @glopesdev in #5
• Expose second ADC channel in the high-level interface by @bruno-f-cruz in #7
• Minor register naming changes by @bruno-f-cruz in #8
• Update interface to use new generators by @glopesdev in #9
• Raise harp core to 1.13 by @filcarv in #10