assistant: Fix assistant: open prompt library not opening the prompt library (#28156)

This PR fixes the `assistant: open prompt library` action in the command
palette not opening the prompt library when the Assistant Panel did not
have focus.

Fixes https://github.com/zed-industries/zed/issues/28058.

Release Notes:

- assistant: Fixed `assistant: open prompt library` not opening the
prompt library when the Assistant Panel was not focused.

crates/zed_actions/src/lib.rs

@@ -190,13 +190,16 @@ pub mod agent {
 }
 
 pub mod assistant {
-    use gpui::{actions, impl_actions};
+    use gpui::{action_with_deprecated_aliases, actions, impl_actions};
     use schemars::JsonSchema;
     use serde::Deserialize;
 
-    actions!(
+    actions!(assistant, [ToggleFocus, ShowConfiguration]);
+
+    action_with_deprecated_aliases!(
         assistant,
-        [ToggleFocus, OpenPromptLibrary, ShowConfiguration]
+        OpenPromptLibrary,
+        ["assistant::DeployPromptLibrary"]
     );
 
     #[derive(Clone, Default, Deserialize, PartialEq, JsonSchema)]