Add file history view (#42441)

Closes #16827

Release Notes:

- Added: File history view accessible via right-click context menu on
files in the editor or project panel. Shows commit history for the
selected file with author, timestamp, and commit message. Clicking a
commit opens a diff view filtered to show only changes for that specific
file.

<img width="1293" height="834" alt="Screenshot 2025-11-11 at 16 31 32"
src="https://github.com/user-attachments/assets/3780d21b-a719-40b3-955c-d928c45a47cc"
/>
<img width="1283" height="836" alt="Screenshot 2025-11-11 at 16 31 24"
src="https://github.com/user-attachments/assets/1dc4e56b-b225-4ffa-a2af-c5dcfb2efaa0"
/>

---------

Co-authored-by: cameron <cameron.studdstreet@gmail.com>

crates/fs/src/fake_git_repo.rs

@@ -446,6 +446,25 @@ impl GitRepository for FakeGitRepository {
         })
     }
 
+    fn file_history(&self, path: RepoPath) -> BoxFuture<'_, Result<git::repository::FileHistory>> {
+        self.file_history_paginated(path, 0, None)
+    }
+
+    fn file_history_paginated(
+        &self,
+        path: RepoPath,
+        _skip: usize,
+        _limit: Option<usize>,
+    ) -> BoxFuture<'_, Result<git::repository::FileHistory>> {
+        async move {
+            Ok(git::repository::FileHistory {
+                entries: Vec::new(),
+                path,
+            })
+        }
+        .boxed()
+    }
+
     fn stage_paths(
         &self,
         paths: Vec<RepoPath>,