Add pixel_mapper submodule

.gitmodules

@@ -490,3 +490,6 @@
 [submodule "libraries/drivers/circuitpython-as7343"]
 	path = libraries/drivers/circuitpython-as7343
 	url = https://github.com/joepardue/circuitpython-as7343.git
+[submodule "libraries/helpers/pixel_mapper"]
+	path = libraries/helpers/pixel_mapper
+	url = https://github.com/clickonben/CircuitPython_pixel_mapper.git

circuitpython_community_library_list.md

@@ -39,7 +39,7 @@ Here is a listing of current CircuitPython Community Libraries. These libraries
 * [CircuitPython_paj7620](https://github.com/deshipu/circuitpython-paj7620.git) A driver for the PAJ7620 gesture sensor.
 * [CircuitPython PCA9674](https://github.com/XENONFFM/CircuitPython_PCA9674.git) Driver for the NXP PCA9674(A) 8 channel I2C I/O expander ([PyPi](https://pypi.org/project/circuitpython-pca9674))
 * [CircuitPython PCA9955b](https://github.com/noelanderson/CircuitPython_PCA9955B.git) Driver for the NXP PCA9955b 16-Channel I2C-Bus Constant-Current LED Driver ([Docs](https://circuitpython-pca9955b.readthedocs.io/en/latest/))
-* [CircuitPython qmi8658c](https://github.com/jins-tkomoda/CircuitPython_QMI8658C.git) Driver for the QMI8658C inertial measurement unit 
+* [CircuitPython qmi8658c](https://github.com/jins-tkomoda/CircuitPython_QMI8658C.git) Driver for the QMI8658C inertial measurement unit
 ([Docs](https://circuitpython-qmi8658c.readthedocs.io/en/latest/))
 * [CircuitPython Raspberry PI Build HAT](https://github.com/CDarius/CircuitPython_RaspberryPI_BuildHAT.git) Driver for Raspberry PI Build HAT \([Docs](https://circuitpython-raspberrypi-buildhat.readthedocs.io/en/latest/))
 * [CircuitPython RDA5807](https://github.com/tinkeringtech/CircuitPython_rda5807) rda5807m FM radio chip CircuitPython library \([Docs](https://circuitpython-rda5807m.readthedocs.io/en/latest/))
@@ -133,6 +133,7 @@ Here is a listing of current CircuitPython Community Libraries. These libraries
 * [CircuitPython PaletteSlice](https://github.com/CedarGroveStudios/CircuitPython_PaletteSlice.git) Wrap a displayio.Palette object to permit list-like slicing \([Docs](https://github.com/CedarGroveStudios/CircuitPython_PaletteSlice/blob/main/media/pseudo_rtd_paletteslice.pdf))
 * [CircuitPython Parse](https://github.com/jimbobbennett/CircuitPython_Parse) Parse (absolute and relative) URLs ([PyPi](https://pypi.org/project/circuitpython-parse)) \([Docs](https://circuitpython.readthedocs.io/projects/parse/en/latest/))
 * [CircuitPython_PIO_I2S](https://github.com/relic-se/CircuitPython_PIO_I2S.git) CircuitPython library to handle bidirectional I2S communication using PIO to be used with audio codecs and microphones \([Docs](https://circuitpython-pio-i2s.readthedocs.io/))
+* [CircuitPython_pixel_mapper](https://github.com/clickonben/CircuitPython_pixel_mapper/) Pixel Mapper helper for Adafruit_CircuitPython_LED_Animation ([PyPI](https://pypi.org/project/circuitpython-pixel-mapper/)) \([Docs](https://circuitpython-pixel-mapper.readthedocs.io/))
 * [CircuitPython_PunkConsole](https://github.com/CedarGroveStudios/CircuitPython_PunkConsole.git) Emulate the Atari Punk Console \([Docs](https://github.com/CedarGroveStudios/CircuitPython_PunkConsole/blob/main/media/pseudo_readthedocs_cedargrove_punkconsole.pdf))
 * [CircuitPython_RangeSlicer](https://github.com/CedarGroveStudios/CircuitPython_RangeSlicer.git) Scale a range of input values into quantized range using hysteresis for noise reduction \([Docs](https://github.com/CedarGroveStudios/CircuitPython_RangeSlicer/blob/master/media/pseudo_readthedocs_rangeslicer.pdf))
 * [CircuitPython_RGB_SpectrumTools](https://github.com/CedarGroveStudios/CircuitPython_RGB_SpectrumTools.git) Methods and classes for converting a normalized spectral index to RGB color values \([Docs](https://github.com/CedarGroveStudios/CircuitPython_RGB_SpectrumTools/blob/main/media/pseudo_rtd_cedargrove_rgb_spectrumtools.pdf))