Reuse Invite3pid object across spec

[td-famedly]

Link to problem area:

object:

matrix-spec/data/api/client-server/create_room.yaml

Line 135 in 938022b

title: Invite3pid

Could be reused here f.ex:

matrix-spec/data/api/client-server/third_party_membership.yaml

Line 86 in 938022b

properties:

There could be other places we could reuse this at too

[richvdh]

We're always very happy to receive PRs for this sort of thing!

[richvdh]

(are you proposing a change to how the spec text is displayed? or would this just be a change to the OpenAPI objects?)

[td-famedly]

The latter, the issue is so that I don't forget to create a PR later or maybe someone else would also like to pick this up befor that :D