Revert "Make FontSystem not self-referencing and update fontdb and rustybuzz"

src/font/matches.rs

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+use alloc::sync::Arc;
+#[cfg(not(feature = "std"))]
+use alloc::{string::String, vec::Vec};
+
+use crate::Font;
+
+/// Fonts that match a pattern
+pub struct FontMatches<'a> {
+    pub locale: &'a str,
+    pub default_family: String,
+    pub fonts: Vec<Arc<Font<'a>>>,
+}