simln-lib/refactor: move parsing into its own module

[f3r10]

fix #214

[f3r10]

Hi, @carlaKC I found that async closures are already stabilized on the latest version of rust: rust-lang/rust#132706 so maybe I could update the CI to use version 1.85. WDYT?

btw. most of the changes are based on this previous commit of yours: carlaKC@1951bb8

[chuksys]

WDYT of moving the NodeConnection enum into the parsing module as suggested in the issue description?

[f3r10]

yes, you are right, @chuksys. NodeConnection also has to be moved.
I am going to close this PR so we can focus on yours #232

[carlaKC]

Hi, @carlaKC I found that async closures are already stabilized on the latest version of rust: rust-lang/rust#132706 so maybe I could update the CI to use version 1.85. WDYT?

Oh good news! I think let's bump version if we end up using them in the PR that addresses this?