Supporting data types in yml filename extension

[Jetsama]

Instead of using type variable to differentiate between terminal, schematic, or maestro test use format such as opamp.schem.yml rather than opamp.yml for easier search and greater clarity for the user when in file explorer. This can cause confusion because a test may be called opamp.yml as well as a schematic and the only way to discern would be to open the file and check the yml's type variable.

[Jetsama]

Completed, now format uses config.filetype.yml and searching should be more efficient.