zeta2: Merge Sweep and Zeta2 Providers (#43097)

Closes #ISSUE

Release Notes:

- N/A *or* Added/Fixed/Improved ...

---------

Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>

crates/edit_prediction_button/src/edit_prediction_button.rs

@@ -28,7 +28,6 @@ use std::{
     time::Duration,
 };
 use supermaven::{AccountStatus, Supermaven};
-use sweep_ai::SweepFeatureFlag;
 use ui::{
     Clickable, ContextMenu, ContextMenuEntry, DocumentationEdge, DocumentationSide, IconButton,
     IconButtonShape, Indicator, PopoverMenu, PopoverMenuHandle, ProgressBar, Tooltip, prelude::*,
@@ -39,6 +38,7 @@ use workspace::{
 };
 use zed_actions::OpenBrowser;
 use zeta::RateCompletions;
+use zeta2::SweepFeatureFlag;
 
 actions!(
     edit_prediction,