adding network size query

[TheMarstonConnell]

Adding a very quick network size query

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.

Project coverage is 42.34%. Comparing base (40d9585) to head (312a976).
Report is 2 commits behind head on master.

Files	Patch %	Lines
x/storage/keeper/files.go	0.00%	16 Missing ⚠️
x/storage/keeper/grpc_query_storage_stats.go	0.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #471      +/-   ##
==========================================
- Coverage   42.49%   42.34%   -0.15%     
==========================================
  Files         404      404              
  Lines       13252    13278      +26     
==========================================
- Hits         5631     5623       -8     
- Misses       7222     7261      +39     
+ Partials      399      394       -5     

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[dahn510]

👍