Add function to convert size from bytes to a more readable format

[lguerard]

Fixes #95

[codecov]

Codecov Report

❌ Patch coverage is 16.66667% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 25%. Comparing base (745fc61) to head (6efda65).
⚠️ Report is 22 commits behind head on devel.

Files with missing lines	Patch %	Lines
src/imcflibs/imagej/misc.py	17%	5 Missing ⚠️

Additional details and impacted files

@@         Coverage Diff          @@
##           devel   #101   +/-   ##
====================================
- Coverage     25%    25%   -0%     
====================================
  Files         25     25           
  Lines       1688   1696    +8     
====================================
+ Hits         421    422    +1     
- Misses      1267   1274    +7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[ehrenfeu]

The function name convert_bytes isn't really telling what it's actually doing, it only reveals the bytes are converted to something unknown.

Please rename it to human_bytes or similar.

[ehrenfeu]

Removed it from the current milestone as this is probably not blocking other code - feel free to re-add if you need it already now.

[ehrenfeu]

#126