add rpc state

[SantiagoPittella]

Description

Add an RPC StateReader implementation.
Add an integration test that runs a function from mainnet.

closes #606

Checklist

• Linked to Github Issue
• Unit tests added
• Integration tests added.
• This change requires new documentation.
  • Documentation has been added/updated.

[codecov-commenter]

Codecov Report

Merging #851 (530c592) into main (6c55cb5) will decrease coverage by 0.74%.
The diff coverage is 0.95%.

@@            Coverage Diff             @@
##             main     #851      +/-   ##
==========================================
- Coverage   91.73%   90.99%   -0.74%     
==========================================
  Files          54       54              
  Lines       12836    12940     +104     
==========================================
  Hits        11775    11775              
- Misses       1061     1165     +104     

Files Changed	Coverage Δ
...rc/services/api/contract_classes/compiled_class.rs	4.34% <0.00%> (-41.11%)	⬇️
src/transaction/invoke_function.rs	99.57% <100.00%> (ø)