Merge pull request #273 from tekktrik/dev/nitroclass

Add dataclasses-like helper library

Author: FoamyGuy

.gitmodules

@@ -520,3 +520,6 @@
 [submodule "libraries/helpers/synthiota"]
 	path = libraries/helpers/synthiota
 	url = https://github.com/relic-se/CircuitPython_Synthiota.git
+[submodule "libraries/helpers/nitroclass"]
+	path = libraries/helpers/nitroclass
+	url = https://github.com/tekktrik/CircuitPython_Nitroclass.git

circuitpython_community_library_list.md

@@ -127,6 +127,7 @@ Here is a listing of current CircuitPython Community Libraries. These libraries
 * [CircuitPython_MIDI_Tools](https://github.com/CedarGroveStudios/CircuitPython_MIDI_Tools.git) A collection of methods for processing MIDI notes and Control Change codes \([Docs](https://github.com/CedarGroveStudios/CircuitPython_MIDI_Tools/blob/main/media/pseudo_rtd_cedargrove_midi_tools.pdf))
 * [CircuitPython_MiniEthers](https://github.com/ShambaC/CircuitPython_MiniEthers) Circuitpython module for ethereum wallet creation and signing. ([PyPi](https://pypi.org/project/circuitpython-miniethers/)) \([Docs](https://circuitpython-miniethers.readthedocs.io/en/latest/))
 * [CircuitPython MorseCode](https://github.com/jposada202020/CircuitPython_MorseCode.git) Circuitpython library to crete Morse code  ([PyPi](https://pypi.org/project/circuitpython-MorseCode)) \([Docs](https://circuitpython-morsecode.readthedocs.io/en/latest/))
+* [CircuitPython Nitroclass](https://github.com/tekktrik/CircuitPython_Nitroclass.git) ([PyPi](https://pypi.org/project/circuitpython-nitroclass/) \([Docs](https://circuitpython-nitroclass.readthedocs.io/en/latest/))) CircuitPython helper library providing equivalent functionality to CPython's dataclasses
 * [CircuitPython Noise](https://github.com/todbot/CircuitPython_Noise.git) ([PyPi](https://pypi.org/project/circuitpython-noise)) \([Docs](https://circuitpython-noise.readthedocs.io/en/latest/)) Simplex (Perlin-like) noise generation
 * [CircuitPython_OhmsLaw](https://github.com/CedarGroveStudios/CircuitPython_OhmsLaw.git) Calculate an Ohm’s Law result from two input parameters \([Docs](https://github.com/CedarGroveStudios/CircuitPython_OhmsLaw/blob/main/media/pseudo_rtd_cedargrove_ohmslaw.pdf))
 * [CircuitPython_Org_DisplayIO_Annotation](https://github.com/circuitpython/CircuitPython_Org_DisplayIO_Annotation.git) Annotation widget for displayio ([PyPi](https://pypi.org/project/circuitpython-displayio-annotation/) \([Docs](https://docs.circuitpython.org/projects/displayio_annotation/en/latest/))