New command to check compatibility between a filelist and a model or config as well as update the text config based on the filelist

there should be a way to check that a given filelist is compatible (i.e. can be used for training/inference) with a text config.

The command should check to see if the filelist has the appropriate text representation (characters/phones) and whether they are tokenized (character_tokens/phone_tokens). It should tokenize if tokens aren't already available. Then it should make a set of all the symbols in the filelist and check that they are all contained in the text config.

The `update` version would then add the missing symbols to the text config.

This would be useful for the situation where someone wants to see if a given filelist is compatible with their model's current configuration. The `update` function would invalidate the model, but would be helpful for the situation where someone:

- runs the wizard for a language that does not have g2p
- then later adds g2p
- then wants to preprocess their phones but their text configuration does not contain the phone list

I imagine being able to check with either a text config or a model (where we just read the text config stored in the model).

Something like `everyvoice check-filelist ` or `everyvoice update-text-config `. The update function should have a warning that it will invalidate any models trained with the previous config.