WIP: Add a setting to visually redact enviroment variables (#7124)

Release Notes:

- Added bash syntax highlighting to `.env` files. 
- Added a `private_files` setting for configuring which files should be
considered to contain environment variables or other sensitive
information.
- Added a `redact_private_values` setting to add or remove censor bars
over variable values in files matching the `private_files` patterns.
-(internal) added a new `redactions.scm` query to our language support,
allowing different config file formats to indicate where environment
variable values can be identified in the syntax tree, added this query
to `bash`, `json`, `toml`, and `yaml` files.

---------

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

crates/editor/src/editor_settings.rs

@@ -13,6 +13,7 @@ pub struct EditorSettings {
     pub scrollbar: Scrollbar,
     pub relative_line_numbers: bool,
     pub seed_search_query_from_cursor: SeedQuerySetting,
+    pub redact_private_values: bool,
 }
 
 /// When to populate a new search's query based on the text under the cursor.
@@ -93,6 +94,13 @@ pub struct EditorSettingsContent {
     ///
     /// Default: always
     pub seed_search_query_from_cursor: Option<SeedQuerySetting>,
+
+    /// Hide the values of variables in `private` files, as defined by the
+    /// private_files setting. This only changes the visual representation,
+    /// the values are still present in the file and can be selected / copied / pasted
+    ///
+    /// Default: false
+    pub redact_private_values: Option<bool>,
 }
 
 /// Scrollbar related settings