refactor: /New -> /Initialize §1: simple animals

[warriorstar-orion]

What Does This PR Do

This PR migrates all overrides of /New for simple animals to /Initialize.

Why It's Good For The Game

See #27261.

Testing

• Ensured butterflies spawn in different colors.
• Ensured chicks spawn with random pixel offsets.
• Ensured mice spawn with different colors.
• Ensured Runtime persistent data was registered at roundstart.
• Ensured diona nymph names were randomized and rootspeak language added.
• Ensured parrot player verbs were added and Poly had eng channel access. Perching continues to not work because it hasn't worked since [TM] Port TG Jump Point Search and SSpathfinder #18984 two years ago when the first JPS implementation was added because everything in the desired perches list is dense which means they count as an obstacle for pathfinding and I'm not fixing it because basic mobs will fix it, and also their flying trait doesn't get removed when perching so it looks like they're floating while sitting.
• Ensured dragging admin ghost onto object properly creates possessed objects and spawning one manually properly stacktraces.
• Ensured chickens were added to GLOB.chicken_count and their pixel offsets were randomized.

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Declaration

• I confirm that I either do not require pre-approval for this PR, or I have obtained such approval and have included a screenshot to demonstrate this below.

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Changelog

NPFC

[Contrabang]

LGTM

[AffectedArc07]

PR seems fine, might be worth chucking it on TM for a day or so.

[warriorstar-orion]

PR seems fine, might be worth chucking it on TM for a day or so.

Queued up for TM.

[DGamerL]

TM has been on live for 4 days, 0 issues reported
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