feat: consolidated kdl parsing logic into new 'hipcheck-kdl' crate

[patrickjcasey]

When upgrading the kdl crate from 4.x to the latest 6.x version, I noticed there was considerable amounts of kdl.rs files copied into various plugins. The kdl crate versions were subtly different between them and any changes to KDL parsing code would currently need to be updated in 5 different crates.

To ease future maintenance burden, I consolidated all of the KDL logic into a new library crate hipcheck-kdl, which contains:

• common traits and functions typically used in hipcheck code (ParseKdlNode, ToKdlNode, extract_data, string_newtype_parse_kdl_node)
• re-export of the kdl crate under the kdl module of hipcheck-kdl

[alilleybrinker]

Rather than doing this, I recommend checking out cargo-hakari. The pattern you're doing is called the "workspace hack" in the Rust community, and is a way to enforce unification of versions of a common dependency.

https://crates.io/crates/cargo-hakari

[alilleybrinker]

See prior comment.

[alilleybrinker]

Discussed. We can do a workspace hack with cargo hakari in a follow up PR