Expansion: Allow for identifying Log output as Semantic

[hanseltime]

Uses the "Log" language that was introduced by this extension and listens to each log document to scan it for semantics.

Semantics can be configured by the user as outlined in the readme (including their colors).

Please let me know if this should be its own extension. I wanted to pair it with the language definition that I would rely on to detect the document.

Thanks in advance!