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 95.95%. Comparing base (3b9c04e) to head (d2e3c9f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2783      +/-   ##
==========================================
- Coverage   95.95%   95.95%   -0.01%     
==========================================
  Files         379      366      -13     
  Lines       53888    53563     -325     
==========================================
- Hits        51708    51394     -314     
+ Misses       2180     2169      -11     

Flag	Coverage Δ
behaviourtests	4.04% <0.00%> (-0.05%)	⬇️
unittests	96.04% <100.00%> (-0.01%)	⬇️

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[coveralls]

Pull Request Test Coverage Report for Build 9262915667

Details

• 106 of 106 (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:	51623
Relevant Lines:	53746

---

💛 - 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]

@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

[mraspaud]

Very nice that there is so little to change the msi reader python code! I have some questions inline.

[yukaribbba]

pre-commit.ci autofix