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_formatter/src/comments/format.rs

@@ -1,5 +1,4 @@
-use ruff_python_ast::Ranged;
-use ruff_text_size::{TextLen, TextRange, TextSize};
+use ruff_text_size::{Ranged, TextLen, TextRange, TextSize};
 
 use ruff_formatter::{format_args, write, FormatError, SourceCode};
 use ruff_python_ast::node::{AnyNodeRef, AstNode};