file_finder: Remove common segments of long paths in search results (#25049)

This PR makes progress on #7711 by identifying any common prefix of the
paths in the file finder's search results, and replacing the "interior"
of that prefix---every path segment but the first and last---with `...`,
when a heuristic indicates that the longest path would otherwise
overflow the modal.

The elision is not applied to any segment that contains a match for the
search query.

There may be more work to do on #7711 in the case of long result paths
that do not share a significant common prefix.

Release Notes:

- Improved display of long paths in the file finder modal

Co-authored-by: Max <max@zed.dev>

crates/assistant_context_editor/src/context.rs

@@ -650,7 +650,6 @@ impl AssistantContext {
         )
     }
 
-    #[allow(clippy::too_many_arguments)]
     pub fn new(
         id: ContextId,
         replica_id: ReplicaId,
@@ -771,7 +770,6 @@ impl AssistantContext {
         }
     }
 
-    #[allow(clippy::too_many_arguments)]
     pub fn deserialize(
         saved_context: SavedContext,
         path: PathBuf,

crates/assistant_context_editor/src/context_editor.rs

@@ -517,7 +517,6 @@ impl ContextEditor {
         }
     }
 
-    #[allow(clippy::too_many_arguments)]
     pub fn run_command(
         &mut self,
         command_range: Range<language::Anchor>,
@@ -2058,7 +2057,6 @@ impl ContextEditor {
             .unwrap_or_else(|| Cow::Borrowed(DEFAULT_TAB_TITLE))
     }
 
-    #[allow(clippy::too_many_arguments)]
     fn render_patch_block(
         &mut self,
         range: Range<text::Anchor>,

crates/assistant_context_editor/src/slash_command.rs

@@ -136,7 +136,6 @@ impl SlashCommandCompletionProvider {
         })
     }
 
-    #[allow(clippy::too_many_arguments)]
     fn complete_command_argument(
         &self,
         command_name: &str,