gh-102856: Initial implementation of PEP 701 (#102855)

Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
Co-authored-by: Batuhan Taskaya <isidentical@gmail.com>
Co-authored-by: Marta Gómez Macías <mgmacias@google.com>
Co-authored-by: sunmy2019 <59365878+sunmy2019@users.noreply.github.com>

Tools/build/generate_token.py

@@ -80,6 +80,8 @@ extern "C" {
                                  (x) == NEWLINE   || \\
                                  (x) == INDENT    || \\
                                  (x) == DEDENT)
+#define ISSTRINGLIT(x)          ((x) == STRING           || \\
+                                 (x) == FSTRING_MIDDLE)
 
 
 // Symbols exported for test_peg_generator