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_index/src/comment_ranges.rs

@@ -3,7 +3,7 @@ use std::fmt::{Debug, Formatter};
 use std::ops::Deref;
 
 use ruff_python_parser::Tok;
-use ruff_text_size::TextRange;
+use ruff_text_size::{Ranged, TextRange};
 
 /// Stores the ranges of comments sorted by [`TextRange::start`] in increasing order. No two ranges are overlapping.
 #[derive(Clone)]