Add concrete IR

[edg-l]

Simplifies codegen for both MLIR and C

IR documentation rendered: https://github.com/lambdaclass/concrete/blob/mir/docs/IR.md

[codecov-commenter]

Codecov Report

Attention: 705 lines in your changes are missing coverage. Please review.

Comparison is base (e9ac0c9) 60.51% compared to head (77828be) 59.05%.

Files	Patch %	Lines
crates/concrete_codegen_mlir/src/codegen.rs	62.92%	294 Missing ⚠️
crates/concrete_ir/src/lowering.rs	80.84%	154 Missing ⚠️
crates/concrete_ir/src/lowering/prepass.rs	65.80%	93 Missing ⚠️
crates/concrete_codegen_mlir/src/lib.rs	56.52%	60 Missing ⚠️
crates/concrete_driver/src/lib.rs	0.00%	43 Missing ⚠️
crates/concrete_ir/src/lib.rs	50.60%	41 Missing ⚠️
crates/concrete_ir/src/lowering/common.rs	78.04%	9 Missing ⚠️
crates/concrete_codegen_mlir/src/context.rs	85.96%	8 Missing ⚠️
crates/concrete_check/src/lib.rs	0.00%	2 Missing ⚠️
crates/concrete_codegen_mlir/src/errors.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
- Coverage   60.51%   59.05%   -1.46%     
==========================================
  Files          29       34       +5     
  Lines        1674     3136    +1462     
==========================================
+ Hits         1013     1852     +839     
- Misses        661     1284     +623     

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[unbalancedparentheses]

@juanbono @igaray please review it