Prepare v0.1.1 release for crates.io

- Rename `macros` crate to `libmarathon-macros` for better discoverability on crates.io
- Update all imports from `macros::` to `libmarathon_macros::`
- Add crates.io metadata (description, license, repository, homepage, etc.)
- Bump version to 0.1.1
- Add version requirement for libmarathon-macros dependency

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

crates/libmarathon/src/render/render_resource/specializer.rs

@@ -14,7 +14,7 @@ use core::{hash::Hash, marker::PhantomData};
 use tracing::error;
 use variadics_please::all_tuples;
 
-pub use macros::{Specializer, SpecializerKey};
+pub use libmarathon_macros::{Specializer, SpecializerKey};
 
 /// Defines a type that is able to be "specialized" and cached by creating and transforming
 /// its descriptor type. This is implemented for [`RenderPipeline`] and [`ComputePipeline`], and