Add icon for Cairo files (#33268)

Discussion: https://github.com/zed-industries/zed/discussions/33270

Release Notes:

- Add file icon for the Cairo programming language.

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

crates/theme/src/icon_theme.rs

@@ -81,6 +81,7 @@ const FILE_SUFFIXES_BY_ICON_KEY: &[(&str, &[&str])] = &[
     ("bicep", &["bicep"]),
     ("bun", &["lockb"]),
     ("c", &["c", "h"]),
+    ("cairo", &["cairo"]),
     ("code", &["handlebars", "metadata", "rkt", "scm"]),
     ("coffeescript", &["coffee"]),
     (
@@ -279,6 +280,7 @@ const FILE_ICONS: &[(&str, &str)] = &[
     ("bicep", "icons/file_icons/file.svg"),
     ("bun", "icons/file_icons/bun.svg"),
     ("c", "icons/file_icons/c.svg"),
+    ("cairo", "icons/file_icons/cairo.svg"),
     ("code", "icons/file_icons/code.svg"),
     ("coffeescript", "icons/file_icons/coffeescript.svg"),
     ("cpp", "icons/file_icons/cpp.svg"),