feat(ocean-api-client): add ocean-api client core

[fuxingloh]

What this PR does / why we need it:

DeFiChain Ocean API, next^2 generation API for building scalable Native DeFi Apps.

This is the foundational setup for Ocean API development integration into Jellyfish. Have been working on it for the past 3 weeks chipping off integration and migrating code slowly. This PR introduces 4 key concepts/packages with separation of concerns. Although the implementation example is small, they are fully featured working and tested.

Motivation

As part of #580 consolidation efforts. We had multiple projects that were extensions of the jellyfish project. The separated projects allowed us to move quickly initially but proves to be a bottleneck when it comes to development.

By including Ocean API development with jellyfish, it creates a better synergy of DeFiChain open source development across concerns. Singular versioning, source of truth, documentation of entirety of defichain via jellyfish.defichain.com.

@defichain/ocean-api-client

Provides the protocol core for communicating between client and server. Within ocean-api-client, it contains a shared response and exception structure.

The official JS client for ocean-api. As the development of ocean-api client and server are closely intertwined, this allows the project to move iteratively together. With them packaged together within the same repo, the server and client can be released together. This allows us to be the consumer of our own client implementation. Testing each server endpoint directly with ocean-api-client, dogfooding at the maximum.

[codeclimate]

Code Climate has analyzed commit addbfd6 and detected 0 issues on this pull request.

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[codecov]

Codecov Report

Merging #909 (addbfd6) into main (981ae67) will decrease coverage by 0.50%.
The diff coverage is 80.99%.

@@            Coverage Diff             @@
##             main     #909      +/-   ##
==========================================
- Coverage   96.62%   96.11%   -0.51%     
==========================================
  Files         134      141       +7     
  Lines        4384     4505     +121     
  Branches      570      584      +14     
==========================================
+ Hits         4236     4330      +94     
- Misses        148      175      +27     

Impacted Files	Coverage Δ
packages/ocean-api-client/src/OceanApiClient.ts	56.60% <56.60%> (ø)
packages/ocean-api-client/src/ApiResponse.ts	100.00% <100.00%> (ø)
...ckages/ocean-api-client/src/errors/ApiException.ts	100.00% <100.00%> (ø)
...an-api-client/src/errors/ApiValidationException.ts	100.00% <100.00%> (ø)
...ges/ocean-api-client/src/errors/ClientException.ts	100.00% <100.00%> (ø)
...es/ocean-api-client/src/errors/TimeoutException.ts	100.00% <100.00%> (ø)
packages/ocean-api-client/src/index.ts	100.00% <100.00%> (ø)
...ellyfish-transaction/src/script/dftx/dftx_token.ts	76.74% <0.00%> (-23.26%)	⬇️
...ellyfish-transaction-signature/src/tx_signature.ts	90.80% <0.00%> (-3.45%)	⬇️
packages/jellyfish-transaction/src/tx_composer.ts	78.33% <0.00%> (-1.67%)	⬇️
... and 6 more

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