Fix edit prediction disablement with "disable_ai": true setting (#35513)

Even after #35327 edit predictions were still being queried and shown
after setting `"disable_ai": true`

Also moves `DisableAiSettings` to the `project` crate so that it gets
included in tests via existing use of `Project::init_settings(cx)`.

Release Notes:

- Fixed `"disable_ai": true` setting disabling edit predictions.

crates/zed/src/zed/quick_action_bar.rs

@@ -2,7 +2,6 @@ mod preview;
 mod repl_menu;
 
 use agent_settings::AgentSettings;
-use client::DisableAiSettings;
 use editor::actions::{
     AddSelectionAbove, AddSelectionBelow, CodeActionSource, DuplicateLineDown, GoToDiagnostic,
     GoToHunk, GoToPreviousDiagnostic, GoToPreviousHunk, MoveLineDown, MoveLineUp, SelectAll,
@@ -16,6 +15,7 @@ use gpui::{
     FocusHandle, Focusable, InteractiveElement, ParentElement, Render, Styled, Subscription,
     WeakEntity, Window, anchored, deferred, point,
 };
+use project::DisableAiSettings;
 use project::project_settings::DiagnosticSeverity;
 use search::{BufferSearchBar, buffer_search};
 use settings::{Settings, SettingsStore};