Add support for some MWS composite image generation

[adybbroe]

Add support for some MWS composite image generation (based on AWS) and fix file pattern

• Closes #xxxx
• Tests added
• Fully documented
• Add your name to AUTHORS.md if not there already

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.34%. Comparing base (4597879) to head (3521f40).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3336   +/-   ##
=======================================
  Coverage   96.34%   96.34%           
=======================================
  Files         463      463           
  Lines       58970    58970           
=======================================
  Hits        56813    56813           
  Misses       2157     2157           

Flag	Coverage Δ
behaviourtests	3.59% <ø> (ø)
unittests	96.43% <ø> (ø)

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[coveralls]

Pull Request Test Coverage Report for Build 21941416711

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.422%

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Totals
Change from base Build 21858232485:	0.0%
Covered Lines:	56693
Relevant Lines:	58797

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💛 - Coveralls

[gerritholl]

Do you have some example images on what those look like? Many people will have never seen MW composites before.