Feat(torii-grpc): Add total_count on RetrieveEntitiesResponse

[gianalarcon]

Closes #1423

[codecov]

Codecov Report

Attention: 39 lines in your changes are missing coverage. Please review.

Comparison is base (374f2bf) 70.06% compared to head (9d6f4ec) 70.42%.
Report is 43 commits behind head on main.

Files	Patch %	Lines
crates/torii/grpc/src/server/mod.rs	0.00%	37 Missing ⚠️
crates/torii/client/src/client/mod.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1545      +/-   ##
==========================================
+ Coverage   70.06%   70.42%   +0.36%     
==========================================
  Files         236      261      +25     
  Lines       22531    25333    +2802     
==========================================
+ Hits        15786    17842    +2056     
- Misses       6745     7491     +746     

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[broody]

LGTM

Unfortunately, we don't have good testing for grpc yet (opened an issue to track here #1570)

[broody]

Chatted with @gianalarcon, he's still working on grpc testing. I've done some basic manual testing on this PR and it works fine. What do u guys think bout merging this? @glihm @tarrencev

[glihm]

Looks good to me for a first iteration too.
When testing is up we also may use a CTE instead of doing two queries. 👍