Port metamodel generation command from Teradata SQL parser

[loradd]

The Kolasu Teradata SQL parser implementation contains a CLI command for generating metamodels, this task tracks the progress of attempting to factor out such command into starlasu-tools. In order to do so, it might be required to establish some sort of classpath or folder-based scanning approach. This feature is only meant for Kolasu parsers (hence Kotlin) for the moment.

As mentioned in this comment.