Simple Plugin System

[tuxgitbot]

add a plugin system so we can move the atl specific things away from tux

requirements for the plugin system that need to be figured out

• be able to edit db and add custom things to db
• create cogs
• add packages

[electron271]

i think for the be able to edit db portion we shift the cases stuff away from being enums (for custom case types) and also add a table called custom with the parameters plugin id, id, and data (which can just be json or something similar)

[electron271]

somewhat accomplished by #828

[cherryl1k]

some ideas i had came up with was having the poetry script run and check a plugin/ directory for a toml file (pyprojecy.toml) for dependcys and also a configuration file in the plugin's folder that specifiys the database modifications and giving plugins their own database directorys per plugin as needed