currentCulture set to invariant instead system choice

[iseeeva]

for #46 issue

[HarGabt]

I think this issue can be solved by replacing certain ToLower instance(s) to ToLowerInvariant one

Refer to CadeEvs#209, a contributor there also had some issues with Turkish locale due to ToLower implementation and usage

[iseeeva]

default culture looks way more useful than changing every method to invariant alternatives
or we can strict the project to en-US rules instead

[shoushou1106]

In my opinion, this pr will conflict with #56 . Because if this fork is going to support multi language, currentCulture could be used to detect user's language preference and select language automatically for user. This would be very convenient, especially for those who cannot find where is Frosty config located.

[shoushou1106]

If this issue must be fixed by changing currentCulture, you could try use a Thread where the issue actually happens, instead of killing a .net i18n feature.

https://github.com/CadeEvs/FrostyToolsuite/pull/343/changes#diff-5431f8466c337a05a26f4bc265f43bd924832c47286a819f2196431fc5e666efR160

System.Threading.Thread thread = new System.Threading.Thread(() =>
{
    // Do something
})
{
    // Set CurrentCulture for the thread
    CurrentCulture = CultureInfo.InvariantCulture,
    CurrentUICulture = CultureInfo.InvariantCulture
};
thread.Start(); // Execute the thread
thread.Join(); // Wait until the thread finish