feat: add missing APIs to HomeserverCapabilities

Add `m.room_versions` & `m.account_moderation` that were missed in the
first implementation.

Signed-off-by: Bryant Mairs <bryant@mai.rs>

Author: Susurrus

crates/matrix-sdk/CHANGELOG.md

@@ -8,6 +8,8 @@ All notable changes to this project will be documented in this file.
 
 ### Features
 
+- Add `room_versions()` & `account_moderation()` to `HomeserverCapabilities`.
+  ([#6413](https://github.com/matrix-org/matrix-rust-sdk/pull/6413))
 - Enable sending redaction events through the send queue via `RoomSendQueue::redact`.
   This includes local echoes for redaction events through the new `LocalEchoContent::Redaction`
   variant.

crates/matrix-sdk/src/client/homeserver_capabilities.rs

@@ -2,7 +2,10 @@ use matrix_sdk_base::{StateStoreDataKey, StateStoreDataValue};
 use ruma::{
     api::client::discovery::{
         get_capabilities,
-        get_capabilities::v3::{Capabilities, ProfileFieldsCapability},
+        get_capabilities::v3::{
+            AccountModerationCapability, Capabilities, ProfileFieldsCapability,
+            RoomVersionsCapability,
+        },
     },
     profile::ProfileFieldName,
 };
@@ -109,6 +112,22 @@ impl HomeserverCapabilities {
         Ok(ProfileFieldsCapability::new(false))
     }
 
+    /// Returns the room versions supported by the server.
+    ///
+    /// Spec: <https://spec.matrix.org/latest/client-server-api/#mroom_versions-capability>
+    pub async fn room_versions(&self) -> crate::Result<RoomVersionsCapability> {
+        let capabilities = self.load_or_fetch_homeserver_capabilities().await?;
+        Ok(capabilities.room_versions)
+    }
+
+    /// Returns whether the user can perform account moderation actions.
+    ///
+    /// Spec: <https://spec.matrix.org/latest/client-server-api/#get_matrixclientv3capabilities_response-200_accountmoderationcapability>
+    pub async fn account_moderation(&self) -> crate::Result<AccountModerationCapability> {
+        let capabilities = self.load_or_fetch_homeserver_capabilities().await?;
+        Ok(capabilities.account_moderation)
+    }
+
     /// Returns whether or not the server automatically forgets rooms which the
     /// user has left.
     ///