refactor: Ruma upstreaming, half-baked edition

Co-authored-by: Jade Ellis <jade@ellis.link>

src/api/Cargo.toml

@@ -89,6 +89,7 @@ log.workspace = true
 rand.workspace = true
 reqwest.workspace = true
 ruma.workspace = true
+ruminuwuity.workspace = true
 serde_html_form.workspace = true
 serde_json.workspace = true
 serde.workspace = true