Read colormap and colorinterp from GeoTIFF as an attribute

[weiji14]

Preliminary support to read in and write color interpretation information from GeoTIFF files. Partially based on @alando46's code at https://github.com/pydata/xarray/pull/3136. Rasterio reference at https://rasterio.readthedocs.io/en/latest/topics/color.html

• [ ] Addresses #191
• [ ] Tests added
• [ ] Fully documented, including docs/history.rst for all changes and docs/rioxarray.rst for new API

[snowman2]

#429 should help.

[codecov[bot]]

Codecov Report

Merging #414 (edc9972) into master (1755f90) will increase coverage by 0.04%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #414      +/-   ##
==========================================
+ Coverage   96.07%   96.11%   +0.04%     
==========================================
  Files          13       13              
  Lines        1530     1546      +16     
==========================================
+ Hits         1470     1486      +16     
  Misses         60       60              

Impacted Files	Coverage Δ
rioxarray/_io.py	95.21% <100.00%> (+0.09%)	:arrow_up:
rioxarray/raster_writer.py	91.50% <100.00%> (+0.69%)	:arrow_up:

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[snowman2]

Closing because this PR has become stale. Feel free to re-open or submit a new PR if you would like to contribute this feature.