The IDL yaml schema (buildscripts/idl/idl_schema.yml) used for VSCode code completion, hover documentation, and validation is currently separate from the IDL parser (buildscripts/idl/idl/parser.py), meaning there's two IDL specifications. This means developers adding functionality to IDL parsing will also need to add a couple lines to idl_schema.yml.

We should either auto generate the idl_schema.yml based off of the spec in syntax.py, or generate definitions in syntax.py based off of idl_schema.yml.