Improvement for fat file names

[Amjad50]

So, there are 2 issues currently relating to fat names

1- we are comparing files incorrectly, FAT by nature is case insensitive, so we need to compare files correctly when treversing. For this, we can have a new method in the Filesystem trait that will allow comparing entries, or maybe another method that will handle treversing?

2- Currently, if there is a file named longfilename1, if we try to create longfilename2, it will tell us the file already exists, I'm not sure if this is correct since the short name will match and become LONGFI~1, if that happened, we need to instead choose another value, it could be from ~1 to ~999999.