Move {AnyNodeRef, AstNode} to ruff_python_ast crate root (#8030)

This is a do-over of https://github.com/astral-sh/ruff/pull/8011, which
I accidentally merged into a non-`main` branch. Sorry!

crates/ruff_python_formatter/src/comments/debug.rs

@@ -180,7 +180,7 @@ mod tests {
     use insta::assert_debug_snapshot;
 
     use ruff_formatter::SourceCode;
-    use ruff_python_ast::node::AnyNode;
+    use ruff_python_ast::AnyNode;
     use ruff_python_ast::{StmtBreak, StmtContinue};
     use ruff_python_trivia::CommentRanges;
     use ruff_text_size::{TextRange, TextSize};

crates/ruff_python_formatter/src/comments/format.rs

@@ -1,8 +1,8 @@
 use std::borrow::Cow;
 
 use ruff_formatter::{format_args, write, FormatError, FormatOptions, SourceCode};
-use ruff_python_ast::node::{AnyNodeRef, AstNode};
 use ruff_python_ast::PySourceType;
+use ruff_python_ast::{AnyNodeRef, AstNode};
 use ruff_python_trivia::{
     is_pragma_comment, lines_after, lines_after_ignoring_trivia, lines_before,
 };

crates/ruff_python_formatter/src/comments/mod.rs

@@ -96,8 +96,8 @@ pub(crate) use format::{
     leading_alternate_branch_comments, leading_comments, leading_node_comments, trailing_comments,
 };
 use ruff_formatter::{SourceCode, SourceCodeSlice};
-use ruff_python_ast::node::AnyNodeRef;
 use ruff_python_ast::visitor::preorder::{PreorderVisitor, TraversalSignal};
+use ruff_python_ast::AnyNodeRef;
 use ruff_python_ast::Mod;
 use ruff_python_trivia::{CommentRanges, PythonWhitespace};
 use ruff_source_file::Locator;

crates/ruff_python_formatter/src/comments/node_key.rs

@@ -1,4 +1,4 @@
-use ruff_python_ast::node::AnyNodeRef;
+use ruff_python_ast::AnyNodeRef;
 use std::fmt::{Debug, Formatter};
 use std::hash::{Hash, Hasher};
 
@@ -52,7 +52,7 @@ impl<'a> From<AnyNodeRef<'a>> for NodeRefEqualityKey<'a> {
 #[cfg(test)]
 mod tests {
     use crate::comments::node_key::NodeRefEqualityKey;
-    use ruff_python_ast::node::AnyNodeRef;
+    use ruff_python_ast::AnyNodeRef;
     use ruff_python_ast::StmtContinue;
     use ruff_text_size::TextRange;
     use std::collections::hash_map::DefaultHasher;

crates/ruff_python_formatter/src/comments/placement.rs

@@ -1,7 +1,7 @@
 use std::cmp::Ordering;
 
-use ruff_python_ast::node::AnyNodeRef;
 use ruff_python_ast::whitespace::indentation;
+use ruff_python_ast::AnyNodeRef;
 use ruff_python_ast::{self as ast, Comprehension, Expr, MatchCase, ModModule, Parameters};
 use ruff_python_trivia::{
     find_only_token_in_range, indentation_at_offset, BackwardsTokenizer, CommentRanges,

crates/ruff_python_formatter/src/comments/visitor.rs

@@ -2,7 +2,7 @@ use std::fmt::Debug;
 use std::iter::Peekable;
 
 use ruff_formatter::{SourceCode, SourceCodeSlice};
-use ruff_python_ast::node::AnyNodeRef;
+use ruff_python_ast::AnyNodeRef;
 use ruff_python_ast::{Mod, Stmt};
 // The interface is designed to only export the members relevant for iterating nodes in
 // pre-order.