Standardize Template Error Structure

[jfelchner]

I'd like to begin standardizing the template error structure returned by all of the various Ember components such that we can better utilize the plethora of information that is known at the time the error is thrown.

One of the major end results of this is the ability to generate a very user-friendly error page to developers: ember-cli/broccoli-middleware#4 (comment)

The error structure is still up for discussion, but will be documented here along with the work required on the various other parts of the Ember ecosystem.

Some of the notable locations here in Glimmer are:

• https://github.com/tildeio/glimmer/blob/46656f09030bcfcb22c825f3585cb667eb5c0fe2/packages/glimmer-syntax/lib/utils.ts#L29
• https://github.com/tildeio/glimmer/blob/46656f09030bcfcb22c825f3585cb667eb5c0fe2/packages/glimmer-syntax/lib/utils.ts#L37
• https://github.com/tildeio/glimmer/blob/c16fe9e2fe16860583d74de701e5245f85f15709/packages/glimmer-syntax/lib/parser/handlebars-node-visitors.ts#L22
• https://github.com/tildeio/glimmer/search?utf8=%E2%9C%93&q=path%3Apackages%2Fglimmer-syntax+throw&type=Code

/cc @rwjblue @stefanpenner