initial progress for multiple packages

[edg-l]

The project builder now allows to have a binary and a library at the same time via a main.con and lib.con.

I also changed the way file discovery is done, it starts from lib.con and main.con and via the "mod <name>" declarations it imports and parses the requested modules

# mylib.con
mod mylib {
    mod hello; // this includes the file hello.con to the compilation process, maybe we should use a diferent syntax?

    pub fn mylib() -> i32 {
        return 0;
    }
}

I think with this we can start to structure a stdlib

[github-actions]

Benchmarking factorial

Compiling factorial (factorial.con)
Finished release in 30.662722ms
Running 5000000 iterations
Using input value: 20
Concrete Result = 2432902008176640000 Time taken : 59.28 ms
Rust Result = 2432902008176640000 Time taken : 60.06 ms

Benchmarking fib

Compiling fib (fib.con)
Finished release in 27.270584ms
Running 5000 iterations
Using input value: 20
Concrete Result = 6765 Time taken : 136.08 ms
Rust Result = 6765 Time taken : 85.23 ms

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 85 lines in your changes are missing coverage. Please review.

Project coverage is 61.74%. Comparing base (56a8221) to head (b19ba57).

Files	Patch %	Lines
crates/concrete_driver/src/lib.rs	0.00%	69 Missing ⚠️
crates/concrete_check/src/lib.rs	0.00%	16 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #123      +/-   ##
==========================================
+ Coverage   61.71%   61.74%   +0.02%     
==========================================
  Files          25       25              
  Lines        4532     4530       -2     
==========================================
  Hits         2797     2797              
+ Misses       1735     1733       -2     

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[juanbono]

See comments. I think it needs some docs