support matrix.to links (#1849)

* support room via server params and eventId

* change copy link to matrix.to links

* display matrix.to links in messages as pill and stop generating url previews for them

* improve editor mention to include viaServers and eventId

* fix mention custom attributes

* always try to open room in current space

* jump to latest remove target eventId from url

* add create direct search options to open/create dm with url

src/app/pages/pathSearchParam.ts

@@ -0,0 +1,13 @@
+import { _RoomSearchParams, DirectCreateSearchParams } from './paths';
+
+type SearchParamsGetter<T> = (searchParams: URLSearchParams) => T;
+
+export const getRoomSearchParams: SearchParamsGetter<_RoomSearchParams> = (searchParams) => ({
+  viaServers: searchParams.get('viaServers') ?? undefined,
+});
+
+export const getDirectCreateSearchParams: SearchParamsGetter<DirectCreateSearchParams> = (
+  searchParams
+) => ({
+  userId: searchParams.get('userId') ?? undefined,
+});