Rpc refactor

[xlc]

generate openrpc spec https://github.com/open-web3-stack/jam-rpc-spec

[codecov]

Codecov Report

Attention: Patch coverage is 7.43802% with 112 lines in your changes missing coverage. Please review.

Project coverage is 68.90%. Comparing base (958db5c) to head (6ab1630).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
RPC/Sources/RPC/JSONRPC/RequestParameter.swift	0.00%	53 Missing ⚠️
RPC/Sources/RPC/Server.swift	0.00%	11 Missing ⚠️
RPC/Sources/RPC/Handlers/SystemHandlers.swift	33.33%	8 Missing ⚠️
RPC/Sources/RPC/Handlers/TelemetryHandlers.swift	0.00%	8 Missing ⚠️
RPC/Sources/RPC/Handlers/RPCHandlers.swift	0.00%	7 Missing ⚠️
RPC/Sources/RPC/Handlers/AllHandlers.swift	0.00%	6 Missing ⚠️
RPC/Sources/RPC/JSONRPC/RPCHandler.swift	0.00%	6 Missing ⚠️
RPC/Sources/RPC/Handlers/ChainHandlers.swift	0.00%	5 Missing ⚠️
RPC/Sources/RPC/JSONRPC/FromJSON.swift	16.66%	5 Missing ⚠️
RPC/Sources/RPC/JSONRPC/JSONRPC.swift	33.33%	2 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #235      +/-   ##
==========================================
- Coverage   69.28%   68.90%   -0.39%     
==========================================
  Files         247      249       +2     
  Lines       18734    18815      +81     
==========================================
- Hits        12980    12964      -16     
- Misses       5754     5851      +97     

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