Historical note: this was originally a series of several commits, spread out
over several weeks. They have been squashed together to make `git annotate`
work properly.
The original commits were:
* 91ab3934 <Will> 2021-01-25 21:16:42 -0800 Add raw API end event schemas into /data directory
* aae22f47 <Will> 2021-01-25 21:33:06 -0800 Remove non-data files
* 1092d4ca <Will> 2021-01-26 20:41:33 -0800 Add data-compatiuble extension (.yaml) to all data files that currently omit one
* 21060109 <Will> 2021-01-26 20:57:28 -0800 Remove symlink to event-schemas, and update openAPI schema paths accordingly
* 4f633845 <Travis Ralston> 2021-04-12 21:54:54 -0600 Fix event schema examples too
* 301c7b2f <Will> 2021-02-05 10:15:42 -0800 Restore docs describing OpenAPI extensions that we use
Fixes https://github.com/matrix-org/matrix-doc/issues/1166
Fixes https://github.com/matrix-org/matrix-doc/issues/1527
Fixes https://github.com/matrix-org/matrix-doc/issues/1827
Note: In order to fix the "state events have the following fields: [no words]" bug (1827) we need to resolve references on common event types. When doing this we ultimately end up with more fields than may be required to explain the section, however this commit alters the section descriptions to just say "these fields" instead of "these additional fields".
This is also preferable over trying to get the inheritance reversed in the common event types, as the `/sync` endpoint has a high amount of reliance on partial events definitions.
