JSON Autocompletion

[Adrodoc]

Autocompletion for JSON. Nested JSON should be supported too! The autocompletion of " should generate "a":"b" on the first level, \"a\":\"b\" in the second level and so on.
This autocompletion should be triggered automatically similar to java strings in Eclipse.
An advanced version of this feature would support autocompletion for Minecraft's JSON tags like text, color and even values depending on the key.