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/zed/Cargo.toml

@@ -16,7 +16,7 @@ path = "src/main.rs"
 
 [dependencies]
 activity_indicator.workspace = true
-zed_predict_tos.workspace = true
+zed_predict_onboarding.workspace = true
 anyhow.workspace = true
 assets.workspace = true
 assistant.workspace = true