Add a setting for custom associations between languages and files (#9290)

Closes #5178

Release Notes:

- Added a `file_types` setting that can be used to associate languages
with file names and file extensions. For example, to interpret all `.c`
files as C++, and files called `MyLockFile` as TOML, add the following
to `settings.json`:

    ```json
    {
      "file_types": {
        "C++": ["c"],
        "TOML": ["MyLockFile"]
      }
    }
    ```

As with most zed settings, this can be configured on a per-directory
basis by including a local `.zed/settings.json` file in that directory.

---------

Co-authored-by: Marshall <marshall@zed.dev>

crates/editor/src/editor.rs

@@ -9302,8 +9302,7 @@ impl Editor {
             .redacted_ranges(search_range, |file| {
                 if let Some(file) = file {
                     file.is_private()
-                        && EditorSettings::get(Some((file.worktree_id(), file.path())), cx)
-                            .redact_private_values
+                        && EditorSettings::get(Some(file.as_ref().into()), cx).redact_private_values
                 } else {
                     false
                 }
@@ -9645,22 +9644,16 @@ impl Editor {
         telemetry.report_copilot_event(suggestion_id, suggestion_accepted, file_extension)
     }
 
-    #[cfg(any(test, feature = "test-support"))]
-    fn report_editor_event(
-        &self,
-        _operation: &'static str,
-        _file_extension: Option<String>,
-        _cx: &AppContext,
-    ) {
-    }
-
-    #[cfg(not(any(test, feature = "test-support")))]
     fn report_editor_event(
         &self,
         operation: &'static str,
         file_extension: Option<String>,
         cx: &AppContext,
     ) {
+        if cfg!(any(test, feature = "test-support")) {
+            return;
+        }
+
         let Some(project) = &self.project else { return };
 
         // If None, we are in a file without an extension