Refactor into a single crate

[edg-l]

Current code locs: 8000

[github-actions]

Benchmarking factorial

Compiling factorial (factorial.con)
Finished release in 31.282353ms
Running 5000000 iterations
Using input value: 20
Concrete Result = 2432902008176640000 Time taken : 59.45 ms
Rust Result = 2432902008176640000 Time taken : 61.17 ms

Benchmarking fib

Compiling fib (fib.con)
Finished release in 26.334274ms
Running 5000 iterations
Using input value: 20
Concrete Result = 6765 Time taken : 128.68 ms
Rust Result = 6765 Time taken : 85.64 ms

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 20.20725% with 154 lines in your changes missing coverage. Please review.

Project coverage is 54.61%. Comparing base (9575fbe) to head (c90b4d3).

Files with missing lines	Patch %	Lines
crates/concrete/src/parser/error.rs	0.00%	92 Missing ⚠️
crates/concrete/src/codegen/compiler.rs	48.33%	31 Missing ⚠️
crates/concrete/src/check/mod.rs	0.00%	16 Missing ⚠️
crates/concrete/src/driver/mod.rs	0.00%	12 Missing ⚠️
crates/concrete/src/check/linearity_check.rs	0.00%	1 Missing ⚠️
crates/concrete/src/main.rs	0.00%	1 Missing ⚠️
crates/concrete/src/parser/mod.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #145      +/-   ##
==========================================
+ Coverage   54.57%   54.61%   +0.04%     
==========================================
  Files          27       22       -5     
  Lines        5387     5368      -19     
==========================================
- Hits         2940     2932       -8     
+ Misses       2447     2436      -11     

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[azteca1998]

All crates have been merged into one but the project still uses the same structure, therefore it still has the same problems as before, just that it's now less of a pain to work with.

[azteca1998]

Can't we just leave it as a normal crate (as opposed to having a workspace with a single crate)?