Move Ranged into ruff_text_size (#6919)

## Summary

The motivation here is that this enables us to implement `Ranged` in
crates that don't depend on `ruff_python_ast`.

Largely a mechanical refactor with a lot of regex, Clippy help, and
manual fixups.

## Test Plan

`cargo test`

crates/ruff_python_ast/src/lib.rs

@@ -1,6 +1,8 @@
-use ruff_text_size::{TextRange, TextSize};
 use std::path::Path;
 
+pub use expression::*;
+pub use nodes::*;
+
 pub mod all;
 pub mod call_path;
 pub mod comparable;
@@ -22,36 +24,6 @@ pub mod types;
 pub mod visitor;
 pub mod whitespace;
 
-pub use expression::*;
-pub use nodes::*;
-
-pub trait Ranged {
-    fn range(&self) -> TextRange;
-
-    fn start(&self) -> TextSize {
-        self.range().start()
-    }
-
-    fn end(&self) -> TextSize {
-        self.range().end()
-    }
-}
-
-impl Ranged for TextRange {
-    fn range(&self) -> TextRange {
-        *self
-    }
-}
-
-impl<T> Ranged for &T
-where
-    T: Ranged,
-{
-    fn range(&self) -> TextRange {
-        T::range(self)
-    }
-}
-
 #[derive(Clone, Copy, Debug, Default, PartialEq)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum PySourceType {