`number` implies/represents a float where `integer` does not.
The only remaining `type: number` in the project appear on power levels: those have been left untouched pending clarification.
Fixes https://github.com/matrix-org/matrix-doc/issues/746
According the the openapi spec, examples for responses and schemas should be
raw objects rather than being json strings. (It's unclear what non-json
examples should look like...).
The swagger UI used to support json strings, but no longer does. In short,
let's turn the json strings into their raw formats.