Rename ruff_python_whitespace to ruff_python_trivia (#5886)

## Summary

This crate now contains utilities for dealing with trivia more broadly:
whitespace, newlines, "simple" trivia lexing, etc. So renaming it to
reflect its increased responsibilities.

To avoid conflicts, I've also renamed `Token` and `TokenKind` to
`SimpleToken` and `SimpleTokenKind`.

crates/ruff_python_ast/src/source_code/generator.rs

@@ -10,7 +10,7 @@ use rustpython_parser::ast::{
     TypeParamParamSpec, TypeParamTypeVar, TypeParamTypeVarTuple, WithItem,
 };
 
-use ruff_python_whitespace::LineEnding;
+use ruff_python_trivia::LineEnding;
 
 use crate::source_code::stylist::{Indentation, Quote, Stylist};
 
@@ -1470,7 +1470,7 @@ mod tests {
     use rustpython_ast::Stmt;
     use rustpython_parser::Parse;
 
-    use ruff_python_whitespace::LineEnding;
+    use ruff_python_trivia::LineEnding;
 
     use crate::source_code::stylist::{Indentation, Quote};
     use crate::source_code::Generator;

crates/ruff_python_ast/src/source_code/locator.rs

@@ -6,7 +6,7 @@ use memchr::{memchr2, memrchr2};
 use once_cell::unsync::OnceCell;
 use ruff_text_size::{TextLen, TextRange, TextSize};
 
-use ruff_python_whitespace::find_newline;
+use ruff_python_trivia::find_newline;
 
 use crate::source_code::{LineIndex, OneIndexed, SourceCode, SourceLocation};
 

crates/ruff_python_ast/src/source_code/stylist.rs

@@ -4,7 +4,7 @@ use std::fmt;
 use std::ops::Deref;
 
 use once_cell::unsync::OnceCell;
-use ruff_python_whitespace::{find_newline, LineEnding};
+use ruff_python_trivia::{find_newline, LineEnding};
 use rustpython_literal::escape::Quote as StrQuote;
 use rustpython_parser::lexer::LexResult;
 use rustpython_parser::Tok;
@@ -166,7 +166,7 @@ mod tests {
     use rustpython_parser::lexer::lex;
     use rustpython_parser::Mode;
 
-    use ruff_python_whitespace::{find_newline, LineEnding};
+    use ruff_python_trivia::{find_newline, LineEnding};
 
     use crate::source_code::stylist::{Indentation, Quote};
     use crate::source_code::{Locator, Stylist};