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

crates/macros/Cargo.toml

@@ -1,7 +1,11 @@
 [package]
-name = "macros"
-version = "0.1.0"
+name = "libmarathon-macros"
+version = "0.1.1"
 edition.workspace = true
+description = "Procedural macros for the Marathon game engine"
+license = "MIT"
+repository = "https://github.com/r3t-studios/marathon"
+homepage = "https://github.com/r3t-studios/marathon"
 
 [lib]
 proc-macro = true