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/tests/basic_macro_test.rs

@@ -2,7 +2,7 @@
 use bevy::prelude::*;
 
 // Test 1: Basic struct with synced attribute compiles
-#[macros::synced]
+#[libmarathon_macros::synced]
 struct Health {
     current: f32,
 }
@@ -58,7 +58,7 @@ fn test_health_is_clone_and_copy() {
 }
 
 // Test 2: Struct with multiple fields
-#[macros::synced]
+#[libmarathon_macros::synced]
 struct Position {
     x: f32,
     y: f32,