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

mycelium/README.md

@@ -1,7 +1,16 @@
-# SAL Mycelium
+# SAL Mycelium (`sal-mycelium`)
 
 A Rust client library for interacting with Mycelium node's HTTP API, with Rhai scripting support.
 
+## Installation
+
+Add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+sal-mycelium = "0.1.0"
+```
+
 ## Overview
 
 SAL Mycelium provides async HTTP client functionality for managing Mycelium nodes, including: