AShell: Manage a command line shell in pure PHP

This package can be used create and manage a command line shell in pure PHP.

It can read commands from the standard input and execute recognized commands implemented by separate classes.

The list of recognized commands can be customized by registering PHP classes that implement new custom command handler.

The main class enters in an event loop that displays a prompt, reads commands from the standard input and dispatches the commands calling the command handler classes. The loop ends when the exit command is executed.

Several built-in custom command handlers classes are provided to execute actions like listing all registered commands, providing usage help about a command and example hello world command.