Allow ignoring certain folders/extensions

[pirate]

For many projects, .gitignore is not enough, we also want to explicitly ignore certain folders of autogenerated code while keeping them in version control.

For example, in our project we have:

client/
    js/
        vendor/
             ...       // we want to ignore everything in here, but keep it in our VCS

server/
    build/
        ...            // we also want to ignore all autogenerated code in here, while keeping it in our VCS
    src/
        ...            // but we do want to autocomplete any files from here

Suggested Fix:
Allow adding a .tabnineignore file, just like .gitignore, .dockerignore, .npmignore, etc.
This can be excluded from VCS or added, it's up to the user.

[zxqfl]

tabnineignore will be added in the next release. In the meantime, you could try adding a .ignore file.