[RFC] Update existing files

[simenandre]

As create-bjerk-typescript is being updated, I want to be able to update it.

Currently, I am running the command again and resetting the files I don't want to be updated.
Most of the time, I have to reset package.json; the diff isn't very useful.

Maybe it's worth looking into updating the files typically updated by the users if they exist when running create-bjerk-typescript? I.e. package.json could be read and updated, maybe ignoring dependencies?

I would love to have a programmatic way to update workspaces, so they are kept updated with what is happening in this repository.

[braaar]

This would be really cool, but it seems like it would be challenging to pull off