Add matricks auto config override options

[wymcg]

Add all matricks manual options to matricks auto, so that individual settings in a configuration file can be overridden by the user. For example given a config file example.toml:

[matrix]
width = 12
height = 12
fps = 30.0
serpentine = true
brightness = 255

[plugin]
path = "example_plugin.wasm"
loop_plugins = false

Running matricks auto example.toml --fps 60 should run the plugin at 60 FPS, instead of 30 FPS as specified in example.toml.