Avoid accidental gpui transitive dependency in collab

* Make Fs depend on Text, not vise versa

Co-authored-by: Joseph <joseph@zed.dev>
Co-authored-by: Mikayla <mikayla@zed.dev>

crates/copilot/src/copilot.rs

@@ -1188,7 +1188,7 @@ mod tests {
             _: u64,
             _: &clock::Global,
             _: language::RopeFingerprint,
-            _: ::fs::LineEnding,
+            _: language::LineEnding,
             _: std::time::SystemTime,
             _: &mut AppContext,
         ) {