Add vibration reading

[thaus88]

Implement vibration reading method to acquire amplitude and frequency of the measured vibrations.

[dmiklic]

New device name: Fft

• implement Python code to handle
• update docs (assisipy communication protocol)

[dmiklic]

Closed by:

• 2e809d7a313b9013e56dc4e710799cc7ba38f375 (code)
• ac0a3449a55cbd77ed5e0985e28d2980d3fb1547 (doc update)