Expose crate as ::rustapi_rs; update tests

Allow proc-macro expansions to reference this crate via an absolute path by adding `extern crate self as rustapi_rs` and using `::rustapi_rs` when `FoundCrate::Itself` is detected in the macro. This ensures generated code also works in examples/benches inside the rustapi-rs package. Also update the CLI test helper to use `assert_cmd::cargo::cargo_bin_cmd!` instead of `Command::cargo_bin`.

Author: Tuntii

crates/cargo-rustapi/tests/cli_tests.rs

@@ -7,7 +7,7 @@ use tempfile::tempdir;
 
 /// Helper to get the cargo-rustapi binary
 fn cargo_rustapi() -> Command {
-    Command::cargo_bin("cargo-rustapi").expect("Failed to find cargo-rustapi binary")
+    assert_cmd::cargo::cargo_bin_cmd!("cargo-rustapi")
 }
 
 mod new_command {

crates/rustapi-macros/src/lib.rs

@@ -35,7 +35,9 @@ fn get_rustapi_path() -> proc_macro2::TokenStream {
 
     if let Ok(found) = rustapi_rs_found {
         match found {
-            FoundCrate::Itself => quote! { crate },
+            // `FoundCrate::Itself` can occur for examples/benches inside the rustapi-rs package.
+            // Use an absolute crate path so generated code also works in those targets.
+            FoundCrate::Itself => quote! { ::rustapi_rs },
             FoundCrate::Name(name) => {
                 let normalized = name.replace('-', "_");
                 let ident = syn::Ident::new(&normalized, proc_macro2::Span::call_site());

crates/rustapi-rs/src/lib.rs

@@ -59,6 +59,9 @@
 //! rustapi-rs = { version = "0.1.300", features = ["jwt", "cors"] }
 //! ```
 
+// Allow proc-macro expansions to refer to this crate via `::rustapi_rs`.
+extern crate self as rustapi_rs;
+
 // Re-export core functionality
 pub use rustapi_core::*;