Add CLI to AGTree

[scripthunter7]

Since there are many functions available in AGTree, we may can add a CLI at some point.

Here are some examples of what it can do:

• show rule AST / check rule syntax via CLI
• converting filter lists
• serialize filter list to binary file / de-serialize it from binary file
• exporting domains from filter list
• displaying various statistics about the rules
• various compatibility checks
• show compatibility tables in the console
• export filter lists metadata
• verify checksum