feat: add APIs to list and download public remote skills (#10448)

Add API to list / download from remote public skills

codex-rs/exec/src/event_processor_with_human_output.rs

@@ -773,6 +773,8 @@ impl EventProcessor for EventProcessorWithHumanOutput {
             | EventMsg::McpListToolsResponse(_)
             | EventMsg::ListCustomPromptsResponse(_)
             | EventMsg::ListSkillsResponse(_)
+            | EventMsg::ListRemoteSkillsResponse(_)
+            | EventMsg::RemoteSkillDownloaded(_)
             | EventMsg::RawResponseItem(_)
             | EventMsg::UserMessage(_)
             | EventMsg::EnteredReviewMode(_)