Make slash commands more discoverable (#12480)

<img width="648" alt="image"
src="https://github.com/zed-industries/zed/assets/482957/a63df904-fbbe-4e0a-80b2-c98ebee90690">

Release Notes:

- N/A

Co-authored-by: Nathan <nathan@zed.dev>

crates/editor/src/actions.rs

@@ -41,7 +41,7 @@ pub struct MovePageDown {
 #[derive(PartialEq, Clone, Deserialize, Default)]
 pub struct MoveToEndOfLine {
     #[serde(default = "default_true")]
-    pub(super) stop_at_soft_wraps: bool,
+    pub stop_at_soft_wraps: bool,
 }
 
 #[derive(PartialEq, Clone, Deserialize, Default)]

crates/editor/src/editor.rs

@@ -3761,7 +3761,7 @@ impl Editor {
         }))
     }
 
-    fn show_completions(&mut self, _: &ShowCompletions, cx: &mut ViewContext<Self>) {
+    pub fn show_completions(&mut self, _: &ShowCompletions, cx: &mut ViewContext<Self>) {
         if self.pending_rename.is_some() {
             return;
         }