Feature: Choose Ours/Theirs/Both for entire File

I really like this plugin, only thing I wish it has would be some util functions Choose ours/theirs/both for the entire file. The use case is, I had a `yarn.lock` file where many conflicts occurred. It had over 400 conflicts which is actually normal for a larger codebase. Going to next conflict and resolving in this case is not feasible, I just created a quick macro and called it +400 times which worked but seems janky and inefficient. A command mode function for this situation seems appropriate.