* First iteration of specifying Spaces
MSCs:
* https://github.com/matrix-org/matrix-doc/pull/3288
* https://github.com/matrix-org/matrix-doc/pull/2946
* https://github.com/matrix-org/matrix-doc/pull/1772
Note that this makes modifications to the underlying MSCs as well. These are intended to be minor edits to aid clarity/accuracy of the MSCs, as per the proposal process. Functionally, clients and servers might need to change their behaviour slightly as is expected of implementing this stuff early. Synapse has these changes (alongside backwards compatibility) here: https://github.com/matrix-org/synapse/pull/11667
* add changelogs
* Accuracy per review
* Apply suggestions from code review
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
* fully prefix new endpoints
* Fully prefix endpoint in 3616 too
* Fix ordering example
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
* Cut/paste room version spec to its own page
* Move grammar to bottom + add feature matrix
The version grammar is not as interesting as the actual room versions, so this moves that whole section to the bottom.
* Fix all links to room versions
This tweaks the DAG to be simpler, with two linear event chains E4 -> E3
-> E2 -> E1 and E6 -> E5 -> E2 -> E1. The extremities of the DAG are now
the first and only point in the DAG where multiple event parents occur.
Since the point of the diagram is to demonstrate this very situation,
it's better didactically if there is only one such situation in the
diagram.
