Finished refactoring out fs and rope

crates/rope/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "rope"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+path = "src/rope.rs"
+
+[dependencies]
+bromberg_sl2 = "0.6"
+smallvec = { version = "1.6", features = ["union"] }
+sum_tree = { path = "../sum_tree" }
+arrayvec = "0.7.1"
+log = { version = "0.4.16", features = ["kv_unstable_serde"] }
+
+
+[dev-dependencies]
+rand = "0.8.3"
+util = { path = "../util", features = ["test-support"] }
+gpui = { path = "../gpui", features = ["test-support"]  }