✨🧪♻️➕ vanth, vanth_derive: Add derive macro for Vanth trait implementation

- Added `vanth_derive` crate with a procedural macro to automatically implement the `Vanth` trait for structs, including generics.
- Refactored `vanth` crate by removing obsolete `vanth.rs` file.
- Implemented `PartialEq` for `Ty` to enable comparisons with string values and another `Ty`.
- Added integration tests for deriving `Vanth` with generic parameters.
- Updated dependencies: added `quote`, `syn`, and `proc-macro2` crates.

Cargo.toml

@@ -15,3 +15,6 @@ serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.140"
 digest = "0.10.7"
 blake3 = { version = "1.8.2", features = ["traits-preview"] }
+quote = "1.0"
+syn = { version = "2.0", features = ["full"] }
+proc-macro2 = "1.0"