Function reverse_bwt

Reverses the Burrows-Wheeler transform to recover the original string. # Arguments `bwt_string` - The BWT-transformed string `idx_original_string` - The 0-based index of the original string in sorted rotations # Returns The original string before BWT transformation # Panics If `bwt_string` is empty If `idx_original_string` is out of bounds (>= length of `bwt_string`) # Examples ``` # use t

(bwt_string: &str, idx_original_string: usize)