Generate more typescript types and return conversation id with ConversationSummary (#3219)

This PR does multiple things that are necessary for conversation resume
to work from the extension. I wanted to make sure everything worked so
these changes wound up in one PR:
1. Generate more ts types
2. Resume rollout history files rather than create a new one every time
it is resumed so you don't see a duplicate conversation in history for
every resume. Chatted with @aibrahim-oai to verify this
3. Return conversation_id in conversation summaries
4. [Cleanup] Use serde and strong types for a lot of the rollout file
parsing

codex-rs/mcp-types/Cargo.toml

@@ -9,4 +9,4 @@ workspace = true
 [dependencies]
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-ts-rs = { version = "11", features = ["serde-json-impl"] }
+ts-rs = { version = "11", features = ["serde-json-impl", "no-serde-warnings"] }