Offer option to keep semicolons removed with refmt

[Risto-Stevcev]

Applying refmt to code brings back and semicolons that were removed. The proposal here is to provide an option (like prettiers "semi": false) that would remove as many semicolons as it can.

Ideally this would follow a convention like a json file or within package.json or bsconfig.json so that the config is automatically read and applied.

Some other similar options would also be useful, like prettier's "trailingComma": "none" and "arrowParens": "avoid"