Select specific patterns

[musjj]

It'd be nice if we can select which pattern to use during searching. For example:

prefix + @fingers-key + u # URLs
prefix + @fingers-key + h # Hashes
prefix + @fingers-key + w # Any space-separated words

I sometimes want to select an arbitrary word, but I can't just add it to @fingers-patterns-*, since it will add a lot of noise to the default mode. The ability to bind arbitrary patterns would be useful for use-cases like this.