fix: issue where dependencies used local project's remappings instead of their own

[antazoey]

What I did

Somehow an unnoticed bug (until recently) where remappings were resolving to paths from the local projects listings rather than looking at config from the dependency's themselves.

How I did it

Refactored all import remap stuff into its own module and relied on pydantic for some of the leg work.

How to verify it

Easy. Make a project with OZ 4.5 and yearn vaults. Ensure yearn vaults imports resolve using OZ 4.7.1 since it is a dependenc of a dependency (different version of OZ). Lemme know if you need help, I can add more info.

Checklist

• Passes all linting checks (pre-commit and CI jobs)
• New test cases have been added and are passing
• Documentation has been updated
• PR title follows Conventional Commit standard (will be automatically included in the changelog)

[antazoey]

Bonus massive performance gain!

Before

--------------------------------------------------- benchmark: 1 tests --------------------------------------------------
Name (time in ms)                 Min       Max      Mean  StdDev    Median     IQR  Outliers     OPS  Rounds  Iterations
-------------------------------------------------------------------------------------------------------------------------
test_compile_performance     967.7907  967.7907  967.7907  0.0000  967.7907  0.0000       0;0  1.0333       1           1
-------------------------------------------------------------------------------------------------------------------------

After:

--------------------------------------------------- benchmark: 1 tests --------------------------------------------------
Name (time in ms)                 Min       Max      Mean  StdDev    Median     IQR  Outliers     OPS  Rounds  Iterations
-------------------------------------------------------------------------------------------------------------------------
test_compile_performance     189.7997  189.7997  189.7997  0.0000  189.7997  0.0000       0;0  5.2687       1           1
-------------------------------------------------------------------------------------------------------------------------

[antazoey]

basically this logic here fixed the bug

[bitwise-constructs]

Looking good to me