Define our own boot task to make jack-in more robust #1731
Description
When doing middleware injection in boot projects, we add the cider-nrepl artifact as a dependency by passing the -d argument to boot and we add our middleware to tools.nrepl by passing the -m argument to the repl task.
The -d argument is fine, but the -m argument is a little finicky. It only works immediately after the repl task, so there's nothing we can do if the user instead uses a custom task or something like the very popular cljs-repl task.
Instead, cider-nrepl could define its own boot task that properly adds the nrepl middleware. Then all we have to do is inject the dependency with -d and add the task before any other task in cider-boot-params. This wouldn't require the -m argument and would work even if the repl task is not being called directly.