chore: add TS annotation to generated mcp-types (#2424)

Adds the `TS` annotation from https://crates.io/crates/ts-rs to all
types to facilitate codegen.

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* __->__ #2424
* #2423

codex-rs/mcp-types/Cargo.toml

@@ -9,3 +9,4 @@ workspace = true
 [dependencies]
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+ts-rs = { version = "11", features = ["serde-json-impl"] }