feat: Add an HTTP CONNECT proxy for the blockchain node

[mcamou]

Description

This PR partially fixes #619. The other part is actually creating the blockchain node.

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

[codecov]

Codecov Report

Attention: Patch coverage is 34.18367% with 129 lines in your changes missing coverage. Please review.

Project coverage is 12.08%. Comparing base (303f6c6) to head (6f29462).

Files with missing lines	Patch %	Lines
pkg/network/discover.go	26.66%	55 Missing ⚠️
pkg/network/proxy.go	50.00%	36 Missing and 10 partials ⚠️
pkg/config/app.go	0.00%	10 Missing ⚠️
cmd/masa-node/main.go	0.00%	8 Missing ⚠️
node/oracle_node.go	0.00%	5 Missing ⚠️
pkg/config/options.go	0.00%	2 Missing and 1 partial ⚠️
node/options.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #636      +/-   ##
==========================================
+ Coverage   11.23%   12.08%   +0.85%     
==========================================
  Files          93       94       +1     
  Lines        6640     6768     +128     
==========================================
+ Hits          746      818      +72     
- Misses       5834     5880      +46     
- Partials       60       70      +10     

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[mcamou]

I've tested this as just a CONNECT proxy, the only thing left is to actually check with @restevens402 's Cosmos node to see whether it actually makes any good or not.

[mudler]

As this proved to not be working because of technical limitations, we are moving away to this other implementation suggested here: #619 (comment)