Parse floats, parse chars and strings with escape codes

[edg-l]

 mod Simple {
    fn main() -> i64 {
        let a: f32 = my_f32(2.0, 4.0);
        let b: f64 = my_f64(2.0, 4.0);
        return 1;
    }

    fn my_f32(x: f32, y: f32) -> f32 {
        let literal: f32 = 2.0;
        let literal2: f32 = 2.;
        let literal3: f32 = .1;
        return x + y + literal2 + literal3;
    }

    fn my_f64(x: f64, y: f64) -> f64 {
        let literal: f64 = 2.0;
        let literal2: f64 = 2.;
        let literal3: f64 = .1;
        return x + y + literal2 + literal3;
    }
}

 mod Simple {
    fn main() -> i64 {
        let a: char = hello_chars('\t');
        return 1;
    }

    fn hello_chars(a: char) -> char {
        let x: char = 'b';
        let newline: char = '\n';

        return x + newline + a;
    }
}

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (35506b6) 69.61% compared to head (871e7df) 69.82%.

Files	Patch %	Lines
crates/concrete_codegen_mlir/src/codegen.rs	92.85%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #84      +/-   ##
==========================================
+ Coverage   69.61%   69.82%   +0.21%     
==========================================
  Files          28       28              
  Lines        1379     1392      +13     
==========================================
+ Hits          960      972      +12     
- Misses        419      420       +1     

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The merge-base changed after approval.

The merge-base changed after approval.

[unbalancedparentheses]

let literal3: f32 = .1;
let literal2: f32 = 2.;

Please remove this. We don't want to support too much magic. It should be 0.1

[edg-l]

let literal3: f32 = .1;
let literal2: f32 = 2.;

Please remove this. We don't want to support too much magic. It should be 0.1

done

[juanbono]

LGTM

[jrchatruc]

The chars.con file was added but no test is running it, add a test for it (also tests should be reading directly from the files in the examples directory)

[juanbono]

add tests as pointed out by @jrchatruc