feat: Add Rhai scripting support for SAL

- Add Rhai scripting integration to the SAL library.
- Create documentation for Rhai module usage and available functions.
- Implement comprehensive test suite for the Rhai integration.
- Add `.gitignore` entries for test related temporary files.

docs/rhai/index.md

@@ -0,0 +1,73 @@
+# Rhai Scripting in SAL
+
+This documentation covers the Rhai scripting integration in the SAL (System Abstraction Layer) library.
+
+## Overview
+
+SAL provides integration with the [Rhai scripting language](https://rhai.rs/), allowing you to use SAL's functionality in scripts. This enables automation of system tasks, testing, and more complex operations without having to write Rust code.
+
+## Modules
+
+SAL exposes the following modules to Rhai scripts:
+
+- [OS Module](os_module_tests.md): File system operations, downloads, and package management
+- Process Module: Process management and command execution
+- Git Module: Git repository operations
+- Text Module: Text processing utilities
+- Buildah Module: Container image building
+- Nerdctl Module: Container runtime operations
+- RFS Module: Remote file system operations
+
+## Running Rhai Scripts
+
+You can run Rhai scripts using the `herodo` binary:
+
+```bash
+herodo --path path/to/script.rhai
+```
+
+## Testing
+
+SAL includes test scripts for verifying the functionality of its Rhai integration. These tests are located in the `src/rhai_tests` directory and are organized by module.
+
+- [OS Module Tests](os_module_tests.md): Tests for file system, download, and package management operations
+
+## Examples
+
+For examples of how to use SAL's Rhai integration, see the `examples` directory in the project root. These examples demonstrate various features and use cases.
+
+## Writing Your Own Scripts
+
+When writing Rhai scripts that use SAL:
+
+1. Import the necessary modules (they're automatically registered)
+2. Use the functions provided by each module
+3. Handle errors appropriately
+4. Clean up resources when done
+
+Example:
+
+```rhai
+// Simple example of using the OS module
+let test_dir = "my_test_dir";
+mkdir(test_dir);
+
+if exist(test_dir) {
+    print(`Directory ${test_dir} created successfully`);
+    
+    // Create a file
+    let test_file = test_dir + "/test.txt";
+    file_write(test_file, "Hello, world!");
+    
+    // Read the file
+    let content = file_read(test_file);
+    print(`File content: ${content}`);
+    
+    // Clean up
+    delete(test_dir);
+}
+```
+
+## API Reference
+
+For detailed information about the functions available in each module, refer to the module-specific documentation.