✨🧪♻️➕ 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.lock

@@ -1009,6 +1009,7 @@ dependencies = [
  "digest",
  "serde",
  "serde_json",
+ "vanth_derive",
 ]
 
 [[package]]
@@ -1019,6 +1020,15 @@ dependencies = [
  "vanth",
 ]
 
+[[package]]
+name = "vanth_derive"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "variadics_please"
 version = "1.1.0"