Add snippets for do binds in extension

[katauber]

See do binds https://github.com/metafacture/metafacture-fix#binds

functional review: @TobiasNx
code review: @fsteeg

[katauber]

I am not sure anymore what to do here. There is a snippet with suggests the "do-bind" with collector, args and body.

What do we need here @TobiasNx?

[TobiasNx]

To be honest I am not sure.
Collector is wrong should be at least bind.
I think there should be snippets for the specific binds.
Perhaps we should talk about it in the next planning meeting, or @fsteeg knows what we intended here.

[fsteeg]

As far a as I remember this was about updating the terminology, collectors are a Morph concept, should be bind like Tobias said, and in the parentheses it can get parameters (simple values) and/or options (key-value-pairs).

[katauber]

So maybe we want something like this, when yo start typing "do":

And if you choose one entry, it looks like this:

Do we need a specific dexcription for each do bind? The current description is "A do bind changes the execution context of the body functions. They are executed for each element in the list." I think that matches for every do bind :)
And at the moment I'm not sure, where the description is displayed 🙃

[katauber]

parameters or options like this?

Do we want bind or one snippet for every possible bind @TobiasNx @fsteeg ?

[katauber]

Discussed offline with @fsteeg to implement a snippet for each do bind.

[fsteeg]

Nice, very useful with the inline documentation and templates for the different do binds! +1