data: Split the short codes to their own lines
Currently, the frequency is associated to a character and all its codes, except for a single exception.
We are about to split multiple codes for any given character so that the frequency becomes instead associated to a code for a given character. (see #104 (closed))
This commit splits the short codes to their own lines, so that they can have their own frequencies, separated from the frequencies associated to each Cangjie 3 and 5 codes.