Lockpick_RCM now parses the ES save files correctly for much quicker Titlekey extraction, ie linear in number of titlekeys rather than checking the whole save container

Huge thanks to @Thealexbarney for an excellent source of truth on save parsing in the form of https://github.com/Thealexbarney/LibHac/ and for answering so many questions about it on top of all the hard work reversing FS and constantly improving LibHac

Also corrected a major bug in Hekate's heap code (please do the same if you use Hekate code in your own projects! ref https://github.com/CTCaer/hekate/pull/300 ) and eliminated a few of my own memory leaks, both guaranteed and potential