feat: move LLVM-independent data to common

[hedgar2017]

What ❔

Moves some LLVM-unrelated definitions to the common crate.

Why ❔

They can be useful for some crates that doesn't want to depend on LLVM.

Checklist

• PR title corresponds to the body of PR.
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via cargo fmt and checked with cargo clippy.

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 16 lines in your changes missing coverage. Please review.

Project coverage is 23.94%. Comparing base (4daf358) to head (6f48cf3).

Files	Patch %	Lines
src/zksolc/main.rs	0.00%	5 Missing ⚠️
src/lib.rs	0.00%	4 Missing ⚠️
src/process/mod.rs	25.00%	3 Missing ⚠️
src/project/contract/mod.rs	0.00%	1 Missing ⚠️
src/project/thread_pool_evm.rs	0.00%	1 Missing ⚠️
src/solc/standard_json/input/settings/metadata.rs	0.00%	1 Missing ⚠️
src/zksolc/arguments.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #127      +/-   ##
==========================================
- Coverage   23.97%   23.94%   -0.03%     
==========================================
  Files         106      106              
  Lines       14734    14721      -13     
==========================================
- Hits         3532     3525       -7     
+ Misses      11202    11196       -6     

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