Feature docs

[dugalh]

Features:

• fsspec integration to allow remote file IO.
• Add RPC camera model.
• Add camera factories to simplify the CLI and parameter file IO.
• Add oty rpc command for RPC orthorectification.
• Display total orthorectification progress with nested bars on CLI.
• Allow 12 bit JPEG compression when supported by Rasterio,
• Reroute CLI warnings and logs to not interfere with progress bars.
• Incorporate vertical CRS / scale effects for DEM bounds and GSD.
• Rename package from simple_ortho to orthority.

Fixes:

• A number of minor fixes.

Docs:

• Add documentation for a Read the Docs site.
• Docstring adjustments and improvements.

Licensing:

• Change to AGPLv3.

[codecov]

Codecov Report

Attention: Patch coverage is 94.60526% with 82 lines in your changes are missing coverage. Please review.

Project coverage is 93.85%. Comparing base (62fb83c) to head (a202e82).

Files	Patch %	Lines
orthority/cli.py	88.55%	27 Missing ⚠️
orthority/param_io.py	96.87%	16 Missing ⚠️
orthority/utils.py	85.45%	16 Missing ⚠️
orthority/camera.py	95.29%	15 Missing ⚠️
orthority/factory.py	95.12%	6 Missing ⚠️
orthority/exif.py	98.07%	1 Missing ⚠️
orthority/ortho.py	99.26%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
+ Coverage   93.44%   93.85%   +0.40%     
==========================================
  Files          10       11       +1     
  Lines        1618     2212     +594     
==========================================
+ Hits         1512     2076     +564     
- Misses        106      136      +30     

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