Add support for Sentinel-2 MSI L2A SAFE datasets

[yukaribbba]

Add support for Sentinel-2 MSI L2A SAFE datasets

• Tests added
• Fully documented

Composites family:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.97%. Comparing base (3b9c04e) to head (18231e4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2783      +/-   ##
==========================================
+ Coverage   95.95%   95.97%   +0.01%     
==========================================
  Files         379      379              
  Lines       53888    53920      +32     
==========================================
+ Hits        51708    51748      +40     
+ Misses       2180     2172       -8     

Flag	Coverage Δ
behaviourtests	4.08% <0.00%> (-0.01%)	⬇️
unittests	96.06% <100.00%> (+0.01%)	⬆️

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[coveralls]

Pull Request Test Coverage Report for Build 9171397952

Details

• 101 of 101 (100.0%) changed or added relevant lines in 2 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.02%) to 96.05%

---

Files with Coverage Reduction	New Missed Lines	%
satpy/readers/msi_safe.py	1	98.26%

Totals
Change from base Build 9157044280:	0.02%
Covered Lines:	51620
Relevant Lines:	53743

---

💛 - Coveralls

[simonrp84]

Thanks for adding this, it was on my to-do list but you got there first :-)

[yukaribbba]

Thanks for adding this, it was on my to-do list but you got there first :-)

🍺

[yukaribbba]

pre-commit.ci autofix

[yukaribbba]

pre-commit.ci autofix

[yukaribbba]

pre-commit.ci autofix

[yukaribbba]

@simonrp84 If you got time pls also take a look. :D

[mraspaud]

Thanks a lot for this new reader functionality @yukaribbba !
One general comment before I dive deeper into this, could you make this a separate yaml file for this reader? The python code can stay with the l1 reader, but it will be easier to have a separate yaml file as this will make it effectively separate from the l1 reader for the user.

[yukaribbba]

Sure!

[yukaribbba]

The two YAMLs are separated now.

[yukaribbba]

@mraspaud Could you take some time to review this?

[mraspaud]

Yes