Tendermint URI RPC

[tzdybal]

This PR extends RPC functionality to enable URI RPC, for compatibility with Tendermint.

Resolves#218.

[codecov-commenter]

Codecov Report

Merging #224 (f56c92c) into main (a649b55) will increase coverage by 0.99%.
The diff coverage is 90.26%.

@@ Coverage Diff @@## main #224 +/- ##
==========================================
+ Coverage 55.60% 56.59% +0.99% 
==========================================
Files 42 42 Lines 6345 6442 +97 ==========================================
+ Hits 3528 3646 +118 + Misses 2296 2278 -18 + Partials 521 518 -3 

Impacted Files	Coverage Δ
rpc/json/types.go	43.33% <ø> (+6.19%)	⬆️
rpc/json/handler.go	82.66% <90.00%> (+22.24%)	⬆️
da/grpc/grpc.go	67.85% <100.00%> (ø)
rpc/json/service.go	52.33% <100.00%> (+7.47%)	⬆️
rpc/client/client.go	29.30% <0.00%> (+2.09%)	⬆️
store/store.go	73.83% <0.00%> (+5.60%)	⬆️

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[adlerjohn]

How can I test this PR?

[tzdybal]

Manual testing requires cosmos-sdk app to be running. I can update demochain if you want to test this manually.
We need to create end-to-end testing suite.

[adlerjohn]

Would be nice to have more instructions somewhere to know how to manually test these things. utACK

[tzdybal]

I assume "utACK" means "unit tested, ACK" ;)

[adlerjohn]

No, it means untested ACK, which is about the same as unit tested 😂