refactor(lua): rename `watchman_send_query()` to `watchman_send()`
refactor(lua): rename `watchman_send_query()` to `watchman_send()`

Want to avoid overloading the term "query" here. Because sometimes we
send an actual _query_; eg.

    watchman -j '["query", ...]'

And other times we send something else; eg.

    watchman -j '["watch-project", ...]'

So, just call it `watchman_send()`. This means all the places where we
use the word "query" now really do refer to actual queries.

wincent/command-t,wincent/command-t,wincent/command-t