Strip ANSI escape codes from file logging

[Calinou]

Text editors cannot display ANSI escape codes, so these should be stripped from log files to ensure readability.

Since this uses a regex, this works both for print_rich() and manually inserted ANSI escape codes.

This has a slight performance impact: starting Godot, printing 200,000 lines then exiting Godot now takes 1.85 seconds instead of 1.75 seconds on an i9-13900K with a Linux x86_64 optimized (LTO) editor build. It may be possible to have a slightly faster solution using manual string handling, but handling all ANSI escape codes in a robust manner can be nontrivial. I've tried to use strstr() to check for the presence of an ANSI escape code in the log message before applying the regex on it, but it made no difference in performance.

• This closes 'print_rich' saves text to log with tags converted to ANSI symbols what makes closing tags unreadable. #79508.

Preview

stdout appearance for reference:

Before

Log file contents:

raw string0
�[1mte�[91mst�[39m�[22m�[0m
1
�[1mte�[91mst�[39m�[22m�[0m
2
�[1mte�[91mst�[39m�[22m�[0m
3
�[1mte�[91mst�[39m�[22m�[0m
4

After

Log file contents:

test
1
test
2
test
3
test
4

[akien-mga]

Looks good.

At some point we might have to consider making RegEx a core component instead of a module, as we're starting to use it in more and more places and these conditional behaviors are error prone. (It might be the case already that a build without the regex module, while it should compile fine, might have bugs in some features that are not expected.)

[akien-mga]

Thanks!