Feature/example blob

[CleverAkanoa]

Add an example of blob storage

[codecov-commenter]

Codecov Report

Merging #50 (29dcd7e) into main (a3401e3) will increase coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   83.75%   83.94%   +0.19%     
==========================================
  Files          24       24              
  Lines        4716     4716              
==========================================
+ Hits         3950     3959       +9     
+ Misses        766      757       -9     

Impacted Files	Coverage Δ
foundationdb/src/directory/directory_layer.rs	93.50% <0.00%> (+0.20%)	⬆️
foundationdb/src/directory/mod.rs	94.85% <0.00%> (+1.47%)	⬆️
foundationdb/src/directory/directory_partition.rs	81.34% <0.00%> (+4.47%)	⬆️

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[coveralls]

Pull Request Test Coverage Report for Build 2229569400

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 11 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.2%) to 75.812%

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Files with Coverage Reduction	New Missed Lines	%
foundationdb/src/directory/mod.rs	1	94.85%
foundationdb/src/directory/directory_partition.rs	10	81.34%

Totals
Change from base Build 2226655069:	0.2%
Covered Lines:	4109
Relevant Lines:	5420

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💛 - Coveralls