Add new getMiningInfo for multiple masternode support

[benzumbrunn]

What kind of PR is this?:

/kind feature

What this PR does / why we need it:

getMintingInfo is deprecated since adding multiple masternode support from within one server:
https://github.com/DeFiCh/ain/blob/df796cb7d6dbbe0ed7d051e79db0f36630f77afb/src/rpc/mining.cpp#L220

This PR adds getMiningInfo which is the implementation to support multiple mining masternodes:
https://github.com/DeFiCh/ain/blob/df796cb7d6dbbe0ed7d051e79db0f36630f77afb/src/rpc/mining.cpp#L276

Additional comments?:

• Added docs with a deprecated comment for the old one, but please advise if this is the correct way
• getMintingInfo is used as an example in some places, let me know if this PR should replace the examples as well
• Let me know if the test data should include a second node now, since there's an array to test now

[netlify]

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[codecov]

Codecov Report

Merging #229 (84a6e0d) into main (904edd3) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #229   +/-   ##
=======================================
  Coverage   96.36%   96.37%           
=======================================
  Files          65       65           
  Lines        1652     1654    +2     
  Branches      222      222           
=======================================
+ Hits         1592     1594    +2     
  Misses         60       60           

Impacted Files	Coverage Δ
packages/jellyfish-api-core/src/category/mining.ts	100.00% <100.00%> (ø)

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[fuxingloh]

Thanks, I made some minor changes to how the docs are formatted. GitHub Actions is having a Major outage today, I will set this PR to auto-merge when all the checks passes.

https://www.githubstatus.com/