feat: Add herodo package to workspace

- Added the `herodo` package to the workspace.
- Updated the MONOREPO_CONVERSION_PLAN.md to reflect
  the completion of the herodo package conversion.
- Updated README.md and build_herodo.sh to reflect the
  new package structure.
- Created herodo/Cargo.toml, herodo/README.md,
  herodo/src/main.rs, herodo/src/lib.rs, and
  herodo/tests/integration_tests.rs and
  herodo/tests/unit_tests.rs.

herodo/README.md

@@ -0,0 +1,142 @@
+# Herodo - Rhai Script Executor for SAL
+
+**Version: 0.1.0**
+
+Herodo is a command-line utility that executes Rhai scripts with full access to the SAL (System Abstraction Layer) library. It provides a powerful scripting environment for automation and system management tasks.
+
+## Features
+
+- **Single Script Execution**: Execute individual `.rhai` script files
+- **Directory Execution**: Execute all `.rhai` scripts in a directory (recursively)
+- **Sorted Execution**: Scripts are executed in alphabetical order for predictable behavior
+- **SAL Integration**: Full access to all SAL modules and functions
+- **Error Handling**: Clear error messages and proper exit codes
+- **Logging Support**: Built-in logging with `env_logger`
+
+## Installation
+
+Build the herodo binary:
+
+```bash
+cd herodo
+cargo build --release
+```
+
+The executable will be available at `target/release/herodo`.
+
+## Usage
+
+### Execute a Single Script
+
+```bash
+herodo path/to/script.rhai
+```
+
+### Execute All Scripts in a Directory
+
+```bash
+herodo path/to/scripts/
+```
+
+When given a directory, herodo will:
+1. Recursively find all `.rhai` files
+2. Sort them alphabetically
+3. Execute them in order
+4. Stop on the first error
+
+## Example Scripts
+
+### Basic Script
+```rhai
+// hello.rhai
+println("Hello from Herodo!");
+let result = 42 * 2;
+println("Result: " + result);
+```
+
+### Using SAL Functions
+```rhai
+// system_info.rhai
+println("=== System Information ===");
+
+// Check if a file exists
+let config_exists = exist("/etc/hosts");
+println("Config file exists: " + config_exists);
+
+// Download a file
+download("https://example.com/data.txt", "/tmp/data.txt");
+println("File downloaded successfully");
+
+// Execute a system command
+let output = run("ls -la /tmp");
+println("Directory listing:");
+println(output.stdout);
+```
+
+### Redis Operations
+```rhai
+// redis_example.rhai
+println("=== Redis Operations ===");
+
+// Set a value
+redis_set("app_status", "running");
+println("Status set in Redis");
+
+// Get the value
+let status = redis_get("app_status");
+println("Current status: " + status);
+```
+
+## Available SAL Functions
+
+Herodo provides access to all SAL modules through Rhai:
+
+- **File System**: `exist()`, `mkdir()`, `delete()`, `file_size()`
+- **Downloads**: `download()`, `download_install()`
+- **Process Management**: `run()`, `kill()`, `process_list()`
+- **Redis**: `redis_set()`, `redis_get()`, `redis_del()`
+- **PostgreSQL**: Database operations and management
+- **Network**: HTTP requests, SSH operations, TCP connectivity
+- **Virtualization**: Container operations with Buildah and Nerdctl
+- **Text Processing**: String manipulation and template rendering
+- **And many more...**
+
+## Error Handling
+
+Herodo provides clear error messages and appropriate exit codes:
+
+- **Exit Code 0**: All scripts executed successfully
+- **Exit Code 1**: Error occurred (file not found, script error, etc.)
+
+## Logging
+
+Enable detailed logging by setting the `RUST_LOG` environment variable:
+
+```bash
+RUST_LOG=debug herodo script.rhai
+```
+
+## Testing
+
+Run the test suite:
+
+```bash
+cd herodo
+cargo test
+```
+
+The test suite includes:
+- Unit tests for core functionality
+- Integration tests with real script execution
+- Error handling scenarios
+- SAL module integration tests
+
+## Dependencies
+
+- **rhai**: Embedded scripting language
+- **env_logger**: Logging implementation  
+- **sal**: System Abstraction Layer library
+
+## License
+
+Apache-2.0