Add radial pose menu with hotkeys, remove C cycle hotkey

- PlayerPose: Icon (Sprite) + Title (string) UI properties
- PoseMenu: modal pause overlay building a radial menu from Icon Button
  prefab instances; active pose disabled (hover ring marks it); click
  applies pose via SetPoseIndex and closes
- OverviewMenu: pose button wiring with pause hand-off, Esc/Tab chain
  extended; hotkeys C (toggle pose menu) and V (paint mode) mirroring
  the buttons incl. identical gating
- PlayerPoseController: C cycle hotkey and NextPose() removed

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/Scripts/Components/UI/PoseMenu.cs.meta

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