Sensirion sensor drivers

Drivers in RIOT OS

Contributed to open-source operating system, RIOT OS by implementing drivers for sensirion’s differential air-flow(SDP31), CO₂ concentration(SCD30) and particulate matter concentration(SPS30) sensor.

My additions to the OS can be found at the following PRs: #14329, #14447, #14643, #14653, #14747, #14818, #15225, #15335