Configuration (wip)

Squirrel now has a configuration file. squirrel.toml is created in the config directory of your OS (i.e. %appdata%/Squirrel on windows and /home/username/.config/Squirrel on linux), finally allowing some amount of customization support.

right now, only the types and the max_image_size config options work. types allows you to choose which kind of clipboard items are captured/ignored. max_image_size is self explanatory.

attached is the full config file. the remaining options require a bit of work to implement.