feat: Add CI/CD workflows for testing and publishing SAL crates

- Add a workflow for testing the publishing setup
- Add a workflow for publishing SAL crates to crates.io
- Improve crate metadata and version management
- Add optional dependencies for modularity
- Improve documentation for publishing and usage

herodo/Cargo.toml

@@ -18,8 +18,8 @@ path = "src/main.rs"
 env_logger = { workspace = true }
 rhai = { workspace = true }
 
-# SAL library for Rhai module registration
-sal = { path = ".." }
+# SAL library for Rhai module registration (with all features for herodo)
+sal = { path = "..", features = ["all"] }
 
 [dev-dependencies]
 tempfile = { workspace = true }