fix: ruff format + add mcp_apps field to Rust e2e UiCapabilities literal

- python: ruff format reflowed the new _warn_if_mcp_apps_dropped helper
- rust: tests/e2e/elicitation.rs constructs UiCapabilities as a struct
  literal; the new mcp_apps field made it non-exhaustive

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: mattdholloway

python/copilot/client.py

@@ -101,6 +101,7 @@ def _warn_if_mcp_apps_dropped(
             session_id,
         )
 
+
 # ============================================================================
 # Connection Types
 # ============================================================================

rust/tests/e2e/elicitation.rs

@@ -396,6 +396,7 @@ async fn session_capabilities_types_are_properly_structured() {
     let capabilities = github_copilot_sdk::SessionCapabilities {
         ui: Some(UiCapabilities {
             elicitation: Some(true),
+            mcp_apps: None,
         }),
     };