allow loading `.ini` file with the same name as the cold client loader exe name

[otavepto]

allows placing multiple cold_client_loader.exe with different names in the same dir, each having its own .ini file.

useful for games with multiple exe, each requiring a different config.

ex:

• launch_my_game_base.exe --- launch_my_game_base.ini
• launch_my_game_addon.exe --- launch_my_game_addon.ini

etc... in these scenarios, the loader is renamed differently

fallback to ColdClientLoader.ini (old behavior) for compatibility

[Detanup01]

Looks good (I guess) checked the names and stuff and its good. Reviewed & Approved

[otavepto]

Thanks for reviewing it, feel free to merge at any time 👍