BytesToString converts byte slice to string.

CondenseEmptyLines condenses multiple consecutive empty lines in a string to a single empty line, while preserving non-empty lines.

CreateIfNotExists creates a file or a directory only if it does not already exist.

IsExist checks if a file or directory exists.

SplitLines splits a string into lines by '\n' or '\r\n'.

StringToBytes converts string to byte slice.

TruncateString shortens a string longer than n by replacing the middle part with "...<truncated>...".