reskin wolf as hyena — visual + lean-in flavor

Replaces the procedural brown-rectangle "wolf" with the CraftPix Free
Desert Enemy Sprite Sheets hyena. 48×48, side-view, 2-direction via
horizontal flip. AnimatedSprite2D mounted in Wolf.setup() and
Wolf.from_dict() (same pattern as pawn reskin Slice 1). Anims: idle
(4f @ 5fps) + walk (6f @ 10fps). Attack/hurt/death anims skipped for
MVP scope.

Player-facing copy renamed wolf→hyena in strings.gd (6 entries) and
event_catalog.gd (3 EventDef title/body fields). Internal identifiers
(class Wolf, World.wolves, EventBus.wolf_spawned, save class_id
&"wolf", event IDs like &"lone_wolf") stay the same for save compat
— see header comment in wolf.gd.

MCP runtime verified: hyena AnimatedSprite2D mounted on spawn, idle
anim plays, storyteller modal renders "Lone Hyena — A starving hyena
circles your livestock."

Sprites: CraftPix Free Desert Enemy Sprite Sheets.
License: CraftPix Free (commercial OK, attribution appreciated).
https://free-game-assets.itch.io/free-enemy-sprite-sheets-pixel-art

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

art/sprites/Hyena_walk.png.import

@@ -0,0 +1,40 @@
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+path="res://.godot/imported/Hyena_walk.png-5ef407252c6f5cafdb6892139cc44efd.ctex"
+metadata={
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+}
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+[deps]
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+dest_files=["res://.godot/imported/Hyena_walk.png-5ef407252c6f5cafdb6892139cc44efd.ctex"]
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