Add imports

[edg-l]

Depends on #77

Current limitations (todo):

• No support for absolute paths when calling a function
• Import symbol renaming

See: #73

The following compiles:

mod Simple {
    import Other.{hello1};
    import Other.Deep.{hello2};

    fn main() -> i64 {
        return hello1(2) + hello2(2);
    }
}

mod Other {
    pub fn hello1(x: i64) -> i64 {
        return x * 2;
    }

    mod Deep {
        pub fn hello2(x: i64) -> i64 {
            return x * 4;
        }
    }
}

[juanbono]

Please improve error handling. We should specify the modules not found and things like that

[codecov-commenter]

Codecov Report

Attention: 42 lines in your changes are missing coverage. Please review.

Comparison is base (4f68ec5) 68.74% compared to head (68423e9) 68.75%.

Files	Patch %	Lines
crates/concrete_codegen_mlir/src/ast_helper.rs	65.00%	28 Missing ⚠️
crates/concrete_codegen_mlir/src/codegen.rs	77.04%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #79      +/-   ##
==========================================
+ Coverage   68.74%   68.75%   +0.01%     
==========================================
  Files          27       28       +1     
  Lines        1187     1309     +122     
==========================================
+ Hits          816      900      +84     
- Misses        371      409      +38     

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