Add CedarGrove WaveViz to helper library

.gitmodules

@@ -421,6 +421,9 @@
 [submodule "libraries/helpers/wavebuilder"]
 	path = libraries/helpers/wavebuilder
 	url = https://github.com/CedarGroveStudios/CircuitPython_WaveBuilder.git
+[submodule "libraries/helpers/waveviz"]
+	path = libraries/helpers/waveviz
+	url = https://github.com/cedargrovestudios/circuitpython_waveviz.git
 [submodule "libraries/drivers/mpu6886"]
 	path = libraries/drivers/mpu6886
 	url = https://github.com/jins-tkomoda/CircuitPython_MPU6886.git

circuitpython_community_library_list.md

@@ -134,6 +134,7 @@ Here is a listing of current CircuitPython Community Libraries. These libraries
 * [CircuitPython TZDB](https://github.com/evindunn/circuitpython_tzdb) IANA timezones for adafruit_datetime ([PyPi](https://pypi.org/project/circuitpython-tzdb/)) \([Docs](https://circuitpython-tzdb.readthedocs.io/en/latest/))
 * [CircuitPython uplot](https://github.com/jposada202020/CircuitPython_uplot) Plot library for CircuitPython ([PyPi](https://pypi.org/project/circuitpython-uplot/)) \([Docs](https://circuitpython-uplot.readthedocs.io/en/latest/))
 * [CircuitPython_WaveBuilder](https://github.com/CedarGroveStudios/CircuitPython_WaveBuilder.git) A CircuitPython class to construct a composite synthio wave table from a collection of oscillators. \([Docs](https://github.com/CedarGroveStudios/CircuitPython_WaveBuilder/blob/main/media/pseudo_rtd_cedargrove_wavebuilder.pdf))
+* [CircuitPython_WaveViz](https://github.com/CedarGroveStudios/CircuitPython_WaveViz.git) A CircuitPython class to create a positionable displayio.Group graphics widget from a synthio wave table. \([Docs](https://github.com/CedarGroveStudios/CircuitPython_WaveViz/blob/main/media/pseudo_rtd_cedargrove_waveviz.pdf))
 * [Gamblor21 CircuitPython AHRS](https://github.com/gamblor21/Gamblor21_CircuitPython_AHRS.git) This library contains right now one algorithm for AHRS - Attitude and Heading Reference System \([Docs](https://circuitpython-ahrs.readthedocs.io/))
 * [Jepler CircuitPython udecimal](https://github.com/jepler/Jepler_CircuitPython_udecimal.git) Reduced version of the decimal library for CircuitPython ([PyPi](https://pypi.org/project/jepler-circuitpython-udecimal)) \([Docs](https://jepler-udecimal.readthedocs.io/en/latest/))
 * [PiperBlocklyLibrary](https://github.com/buildwithpiper/PiperBlocklyLibrary.git) CircuitPython Library to support block-coding using the RP Pico microcontroller