Javascript CCR: Add "anon funk" command

[chilimangoes]

JavaScript makes heavy use of anonymous functions passed as parameters to other functions as callbacks and event handlers. The current "function" command in the JavaScript CCR contains a NAME and a semicolon at the end, both of which then need to be deleted. This PR adds an "anon funk" command, which produces the following output, suitable for embedding in a parameter list:

function () {
    |<-- cursor here
}

[synkarius]

This is useful. And well-named. :)

One note about the "NAME" and "VALUE" etc. stuff that you see in a bunch of places in the CCR modules: they're meant to be used with the "fill" command from the navigation module. Their design is taken from VoiceCoder's code templates. (The original VoiceCoder, not voicecode.io.)

So for instance, with the "function" command, you'd do something like: "function fill name terminal format sort" to get:

function sort () {}
             | <--- cursor

I know this template style isn't for everyone, and I think multiple ways to approach the task like the way you've implemented here are an appropriate solution. Once I get that command editor up and running (which won't be easy and will take a while, but still...), the user will be able to just uncheck / edit the commands they don't want.

[synkarius]

Uh, and whereas your | cursor mark indicates literally where you meant the cursor should be, mine meant "on the line above this", haha. Whoops.

[chilimangoes]

I had originally named it "lambda" but several other languages actually make a distinction between anonymous functions and lambdas, so I renamed it.

Good to know about the fill command, I hadn't seen that yet.