add delete-problem command to ramp-database

[frcaud]

• add a delete_problem command to CLI of ramp-database
• infos corrections

[codecov]

Codecov Report

Merging #564 (31cc2c3) into master (b29f0b4) will decrease coverage by 0.02%.
The diff coverage is 57.14%.

❗ Current head 31cc2c3 differs from pull request most recent head 24bdddc. Consider uploading reports for the commit 24bdddc to get more accurate results

@@            Coverage Diff             @@
##           master     #564      +/-   ##
==========================================
- Coverage   93.51%   93.48%   -0.03%     
==========================================
  Files         103      103              
  Lines        8944     8951       +7     
==========================================
+ Hits         8364     8368       +4     
- Misses        580      583       +3     

Impacted Files	Coverage Δ
ramp-database/ramp_database/cli.py	95.63% <57.14%> (-1.10%)	⬇️

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[agramfort]

Diff looks good. Can you just add a test and a what’s new entry ? 🙏

[agramfort]

any chance you can assess in the database that the problem is available after you add it and then gone once you remove it? see how it's done elsewhere.