add PDS file for 1.11

[hansihe]

Adds an initial converted PDS file for 1.11.

There are still a few things in the file that are slightly hackish due to missing features in protodefc, but I think this is an acceptable initial state.

[rom1504]

Is the PDS format documented somewhere ?

[hansihe]

As of yet, no.

[rom1504]

so the .pds is in mcdata, but that doesn't make it magically used by things.
I guess node-minecraft-data could provide the file content as a big string.
But then we need ProtoDef-io/protodefc#10

[rom1504]

@hansihe btw, is there now a script to convert a .json to a .pds ? (possibly taking the doc from somewhere else)
We probably don't want to transform everything manually.

Also I think it would be better if the .json and the .pds contained the same information.

How does the protodefc json thing look like now ?

[hansihe]

This is an example of a json spec file. The format is still very loosely defined, and it doesn't contain all the same information as a .pds file does yet, but that's planned. It is currently used by the documentation generator only.

The main thing making it hard to automatically translate a protocol.json from the current format is the semantic difference between switch/mapper and union. If I worked on it, I could definitely get it to work fairly well, but I am unsure how much time I should spend on that versus other things. What do you think?