vim: Fix clipping when navigating over inlay hints (#22813)

This fixes the issue described in this comment:
https://github.com/zed-industries/zed/pull/22439#issuecomment-2563896422

Essentially, we'd clip in the wrong direction when there were multi-line
inlay hints.

It also fixes inline completions for non-Zeta-providers showing up in
normal mode.

Release Notes:

- N/A

crates/inline_completion/src/inline_completion.rs

@@ -21,6 +21,7 @@ pub trait InlineCompletionProvider: 'static + Sized {
     fn name() -> &'static str;
     fn display_name() -> &'static str;
     fn show_completions_in_menu() -> bool;
+    fn show_completions_in_normal_mode() -> bool;
     fn is_enabled(
         &self,
         buffer: &Model<Buffer>,
@@ -61,6 +62,7 @@ pub trait InlineCompletionProviderHandle {
         cx: &AppContext,
     ) -> bool;
     fn show_completions_in_menu(&self) -> bool;
+    fn show_completions_in_normal_mode(&self) -> bool;
     fn refresh(
         &self,
         buffer: Model<Buffer>,
@@ -101,6 +103,10 @@ where
         T::show_completions_in_menu()
     }
 
+    fn show_completions_in_normal_mode(&self) -> bool {
+        T::show_completions_in_normal_mode()
+    }
+
     fn is_enabled(
         &self,
         buffer: &Model<Buffer>,