Add pointer offsetting (add) and intrinsic parsing

[edg-l]

Added the ability to offset a pointer, this allows us to do the following:

mod HelloWorld {
    pub extern fn malloc(size: u64) -> *mut u8;
    pub extern fn puts(data: *mut u8) -> i32;

    fn main() -> i32 {
        let origin: *mut u8 = malloc(12);
        let mut p: *mut u8 = origin;

        *p = 'H';
        p = p + 1;
        *p = 'e';
        p = p + 1;
        *p = 'l';
        p = p + 1;
        *p = 'l';
        p = p + 1;
         *p = 'o';
        p = p + 1;
         *p = ' ';
        p = p + 1;
         *p = 'W';
        p = p + 1;
         *p = 'o';
        p = p + 1;
         *p = 'r';
        p = p + 1;
         *p = 'l';
        p = p + 1;
         *p = 'd';
        p = p + 1;
        *p = '\0';
        puts(origin);

        return 0;
    }
}

Which prints "Hello World"

Also added the ability to add attributes to functions, and declare intrinsics:

mod MyMod {
    #[intrinsic = "simdsomething"]
    pub extern fn myintrinsic();
}

[github-actions[bot]]

Benchmarking factorial

Compiling factorial (factorial.con) Finished release in 30.809279ms Running 5000000 iterations Using input value: 20 Concrete Result = 2432902008176640000 Time taken : 59.21 ms Rust Result = 2432902008176640000 Time taken : 60.24 ms

Benchmarking fib

Compiling fib (fib.con) Finished release in 26.396626ms Running 5000 iterations Using input value: 20 Concrete Result = 6765 Time taken : 135.98 ms Rust Result = 6765 Time taken : 85.24 ms

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 71.42857% with 20 lines in your changes are missing coverage. Please review.

Project coverage is 61.78%. Comparing base (27904dc) to head (aff819d).

Files	Patch %	Lines
crates/concrete_codegen_mlir/src/codegen.rs	69.44%	11 Missing :warning:
crates/concrete_ir/src/lib.rs	0.00%	6 Missing :warning:
crates/concrete_ir/src/lowering.rs	84.21%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #125 +/- ## ========================================== + Coverage 61.63% 61.78% +0.15% ========================================== Files 25 25 Lines 4329 4394 +65 ========================================== + Hits 2668 2715 +47 - Misses 1661 1679 +18 ```

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