feat: Add the HTTP CONNECT proxy for the Cosmos node

[mcamou]

Description

This PR fixes #619 (well partially)

Notes for Reviewers

Signed commits

• [x] Yes, I signed my commits.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 1.28205% with 77 lines in your changes missing coverage. Please review.

Project coverage is 13.18%. Comparing base (bf277c6) to head (e003173).

Files with missing lines	Patch %	Lines
pkg/network/proxy.go	0.00%	69 Missing :warning:
cmd/masa-node/main.go	0.00%	8 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #636 +/- ## ========================================== + Coverage 12.46% 13.18% +0.72% ========================================== Files 93 94 +1 Lines 6739 6816 +77 ========================================== + Hits 840 899 +59 - Misses 5823 5828 +5 - Partials 76 89 +13 ```

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