feat: added wallet side integration for neutrino

[manavdesai27]

This PR adds relevant code for wallet side integration for Neutrino. It is a work in progress.

[codecov]

Codecov Report

❌ Patch coverage is 24.65753% with 55 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.42%. Comparing base (b005869) to head (d07744f).
⚠️ Report is 20 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/blockchain/chain.js	16.66%	20 Missing ⚠️
lib/wallet/walletdb.js	5.26%	18 Missing ⚠️
lib/node/http.js	20.00%	4 Missing ⚠️
lib/blockchain/chaindb.js	50.00%	3 Missing ⚠️
lib/net/pool.js	40.00%	3 Missing ⚠️
lib/wallet/client.js	0.00%	3 Missing ⚠️
lib/wallet/nodeclient.js	57.14%	3 Missing ⚠️
lib/client/node.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1159      +/-   ##
==========================================
- Coverage   69.55%   69.42%   -0.14%     
==========================================
  Files         158      158              
  Lines       26603    26672      +69     
==========================================
+ Hits        18505    18516      +11     
- Misses       8098     8156      +58     

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