Introduce Tabs to Assistant Panel (#13783)

<img width="1652" alt="image"
src="https://github.com/zed-industries/zed/assets/482957/8397ea87-51aa-4b69-85c7-bf963fe2b08a">

Release Notes:

- N/A

crates/assistant/Cargo.toml

@@ -17,6 +17,7 @@ anthropic = { workspace = true, features = ["schemars"] }
 anyhow.workspace = true
 assistant_slash_command.workspace = true
 async-watch.workspace = true
+breadcrumbs.workspace = true
 cargo_toml.workspace = true
 chrono.workspace = true
 client.workspace = true
@@ -24,7 +25,6 @@ collections.workspace = true
 command_palette_hooks.workspace = true
 editor.workspace = true
 feature_flags.workspace = true
-file_icons.workspace = true
 fs.workspace = true
 futures.workspace = true
 fuzzy.workspace = true

crates/assistant/src/assistant.rs

@@ -49,7 +49,8 @@ actions!(
         ResetKey,
         InlineAssist,
         InsertActivePrompt,
-        ToggleHistory,
+        DeployHistory,
+        DeployPromptLibrary,
         ApplyEdit,
         ConfirmCommand,
         ToggleModelSelector

crates/assistant/src/model_selector.rs

@@ -79,6 +79,6 @@ impl RenderOnce for ModelSelector {
                         Tooltip::for_action("Change Model", &ToggleModelSelector, cx)
                     }),
             )
-            .anchor(gpui::AnchorCorner::BottomRight)
+            .attach(gpui::AnchorCorner::BottomLeft)
     }
 }