zeta: Onboarding and title bar banner (#23797)

Release Notes:

- N/A

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Danilo <danilo@zed.dev>
Co-authored-by: João Marcos <joao@zed.dev>

crates/rpc/src/llm.rs

@@ -39,6 +39,9 @@ pub struct PredictEditsParams {
     pub outline: Option<String>,
     pub input_events: String,
     pub input_excerpt: String,
+    /// Whether the user provided consent for sampling this interaction.
+    #[serde(default)]
+    pub can_collect_data: bool,
 }
 
 #[derive(Debug, Serialize, Deserialize)]