Ability to determine source information from constructors

[Zoramite]

Currently constructors (ex: something: !g.string ...) completely replace the value of the constructor so there is no way to determine what the source of the constructor is.

Looking to add in some meta information from the original sourcing of the constructor to make it easier to determine the source of the value. For example:

test: !g.yaml /data/somefile.yaml?test

Could be accessed in the template:

{{doc.test._source_.filename}}

_source_ = {
  'file_name': '/data/somefile.yaml',
  'query': 'test',
  'raw': '/data/somefile.yaml?test',
}

Also, could look into the idea of having the dev server modify the _() shortcut to output the source of the string instead of translating if a param is provided (ex: ?constructor_source=true). Then all of the source information could easily be toggled on for an entire page.