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feat: add the misc and rhythmin command groups

Port two toolsets in from other repositories, developer API first with a Click
layer over it.

`destin misc` holds converters for platform-level formats that belong to no
single game. `coredata` deserialises a compiled Core Data mapping (`.cdm`) or
managed object (`.mom`) model to JSON, dumps the raw keyed archive, or emits the
effective SQLite migration script; `strings` reads an Xcode `.strings` table in
either the compiled or the old-style text form.

`destin rhythmin` reads the data files of the Konami iOS game pop'n rhythmin.
Its BFCodec cipher is Blowfish with exactly one deviation: an F function that
combines the S-box outputs as `(S0 + S1) ^ (S2 + S3)` where the textbook cipher
uses `((S0 + S1) ^ S2) + S3`. The initial P-array and S-boxes are the canonical
constants, so they are embedded and no external table file is needed. On that
sit readers for the `.chr` character data, the `.idx` AEP animation indexes, the
sugoroku `.map` boards, the note charts inside `.orb` and `.acv` packages, and
the dialogue pools inside a 32-bit app binary, with PNG renderers for the boards
and the charts.

Both ports were checked against the originals on real data. The misc converters
are byte-identical over 13 samples, the failure path included. The rhythmin
readers reproduce the originals exactly over 26 animation indexes, 27 boards in
both JSON and text form, 102 charts, and 5 character files, and a rendered
arcade chart is byte-identical. The dialogue extractor is checked against a
synthetic 32-bit Mach-O, because both available app binaries are 64-bit and
both implementations reject them alike.

Signed-off-by: Andrew Udvare <audvare@gmail.com>

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