feat(proposer): introduce proposer transaction builder

[davidtaikocha]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 39.88764% with 107 lines in your changes are missing coverage. Please review.

Project coverage is 50.37%. Comparing base (e1f5393) to head (8958f5f).

❗ Current head 8958f5f differs from pull request most recent head 573b127. Consider uploading reports for the commit 573b127 to get more accurate results

Files	Patch %	Lines
proposer/transaction_builder/blob.go	15.15%	56 Missing ⚠️
proposer/proposer.go	44.44%	16 Missing and 4 partials ⚠️
proposer/transaction_builder/calldata.go	69.81%	11 Missing and 5 partials ⚠️
internal/sender/sender.go	25.00%	6 Missing ⚠️
proposer/transaction_builder/common.go	40.00%	4 Missing and 2 partials ⚠️
prover/server/api.go	0.00%	2 Missing ⚠️
pkg/rpc/tx_blob.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #612      +/-   ##
==========================================
+ Coverage   50.12%   50.37%   +0.24%     
==========================================
  Files          53       56       +3     
  Lines        5787     5799      +12     
==========================================
+ Hits         2901     2921      +20     
+ Misses       2579     2569      -10     
- Partials      307      309       +2     

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