Added:

- `sharedlib` build kind (shared library output)
- ASM projects (`build.language = "asm"`)
- NASM and GAS backends
- `build.platform` architecture hint for `-march` / `/arch`
- Basic CLI integration tests

CONTRIBUTING.md

@@ -30,6 +30,7 @@ Before PR, run:
 cargo fmt --all
 cargo clippy --all-targets --all-features -- -D warnings
 cargo check
+cargo test
 ```
 
 ## CI/CD and Releases