pw64_filesys_dump: add ADAT/DATA string decoding

[roto64]

This change will allow you to see the strings used in various places throughout the game.

Right now the output format looks like this:

0x365FF4|286A44:   DATA: 0x000080:
    00 0f 00 2f 00 3c 00 42 00 37 00 2b 00 35 00 32
    00 38 00 2a 00 2b 00 42 00 24 00 36 00 42 00 30
    00 24 00 31 00 3c 00 42 00 35 00 2c 00 31 00 2a
    00 36 00 42 00 24 00 36 00 42 00 3c 00 32 00 38
    00 fe 00 26 00 24 00 31 00 48 00 42 00 37 00 2b
    00 28 00 31 00 42 00 2f 00 24 00 31 00 27 00 42
    00 32 00 31 00 42 00 37 00 2b 00 28 00 42 00 35
    00 38 00 31 00 3a 00 24 00 3c 00 49 00 fe 00 ff
    --------- Decoded String ---------
    Fly through as many rings as you
    can, then land on the runway.
    ----------------------------------

You can disable the hex output and just have the text if you comment out one line.

Let me know if this format is OK or if anything should be changed.

The whole decoding code can probably be done cleaner but I think this is a good start. There are still some things that need fixing (like "unknown" characters/codes).

[queueRAM]

I may change some of the string hex matching to numeric matching, but otherwise looks good. Thanks for decoding these strings!