Log Message:
re2c: updated to 4.1

4.1 (2025-02-16)

Added new syntax for actions
Added entry, pre-rule and post-rule actions
!entry action binds code at the start of the current finite state machine
!pre_rule action prepernds code to semantic actions of all rules in the current \ 
block or condiiton.
!post_rule action appernds code to semantic actions of all rules in the current \ 
block or condiiton.
Added syntax file option special_escapes that describes allowed escape sequences

Fixed bugs:

(allow using lookahead operator with captures).
(integer overflow caused a very long loop when generating tag names).
(segfault on !use directive in a block with conditions).
(regression with bit-vector optimization).
(failure to recognize escaped double quotes in character literals).
OCaml backend now uses unsafe_get instead of get as the default YYPEEK \ 
implementation.
Zig backend now uses const for yych declaration in --recursive-functions mode.

Benchmarks (C/C++):

Reimplemented benchmarks using google-benchmark library.
Added simple variants without buffer refill.
Removed Kleenex benchmarks.
Removed deprecated TDFA(0) and StaDFA algorithms.
Updated benchmark results.

Build system:

Migrated to Bazel 8 using bzlmod.