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

src/lib.rs

@@ -36,18 +36,44 @@ pub enum Error {
 /// Result type for SAL operations
 pub type Result<T> = std::result::Result<T, Error>;
 
-// Re-export modules
+// Re-export modules conditionally based on features
+#[cfg(feature = "git")]
 pub use sal_git as git;
+
+#[cfg(feature = "kubernetes")]
+pub use sal_kubernetes as kubernetes;
+
+#[cfg(feature = "mycelium")]
 pub use sal_mycelium as mycelium;
+
+#[cfg(feature = "net")]
 pub use sal_net as net;
+
+#[cfg(feature = "os")]
 pub use sal_os as os;
+
+#[cfg(feature = "postgresclient")]
 pub use sal_postgresclient as postgresclient;
+
+#[cfg(feature = "process")]
 pub use sal_process as process;
+
+#[cfg(feature = "redisclient")]
 pub use sal_redisclient as redisclient;
+
+#[cfg(feature = "rhai")]
 pub use sal_rhai as rhai;
+
+#[cfg(feature = "text")]
 pub use sal_text as text;
+
+#[cfg(feature = "vault")]
 pub use sal_vault as vault;
+
+#[cfg(feature = "virt")]
 pub use sal_virt as virt;
+
+#[cfg(feature = "zinit_client")]
 pub use sal_zinit_client as zinit_client;
 
 // Version information