fix: detect indentation in source for generating hook code

[NanobotZ]

Added detecting indentation for generating hook code.
Fixes cases when script's source doesn't use single tabs.
Fixes #575

[kyfex-uwu]

works for me with the game Ultrapool (uses 4 spaces instead of tabs)

[KANAjetzt]

thanks!

[KANAjetzt]

We should add an option that allows developers to set this when integrating the loader, so detection can be skipped if the option is set.

[Ech0klang]

Manually merged this with PR #588 and found it NOT working for a game in a custom version of godot 4.6.
The decompiled version of a script has 5 spaces as indentation, without modification this produced indentation of 1 tab and 5 spaces. I've temporarily "fixed" this for me by overwriting the "Default state" (as set at the end of the modified script)

[NanobotZ]

Manually merged this with PR #588 and found it NOT working for a game in a custom version of godot 4.6. The decompiled version of a script has 5 spaces as indentation, without modification this produced indentation of 1 tab and 5 spaces. I've temporarily "fixed" this for me by overwriting the "Default state" (as set at the end of the modified script)

Could you provide some examples?
I've tested it with some random script text having 5 spaces as indentation, and detected indentation was 5 spaces.