feat(controller): add Simple KCC controller base

[JOY (JOY)]

Summary

• import Fusion Simple KCC addon into Unity project
• wire NetworkPlayer and player prefab to Simple KCC
• document paid asset boundaries and Pirate Adventure reference review
• update controller prototype and setup docs

Verification

• secret scan passed for known Supabase/Nakama credentials
• paid RPG animation asset folder remains ignored
• git diff --cached --check passed before commit
• Docker/Nakama work is in separate PR feat(backend): add Nakama OSS local base #2

Notes

Unity compile still needs final editor verification after package resolution. Draft PR because project rules require reviewer pass before merge.

[gemini-code-assist]

Code Review

This pull request introduces the Photon Fusion Simple KCC addon to establish a server-authoritative movement baseline, updating NetworkPlayer.cs and the player prefab accordingly. The project roadmap and documentation have been expanded to include a Simple KCC spike phase and guidelines for managing paid assets. Feedback identifies opportunities to clean up the NetworkPlayer script by removing redundant component references and suggests removing a hardcoded local file path from the documentation to maintain environment privacy.

[gemini-code-assist]

This initialization is redundant because _kcc is already assigned in Awake(). Since SimpleKCC is a required component on this GameObject, the reference is guaranteed to be available.

[gemini-code-assist]

This null check is unnecessary given the [RequireComponent(typeof(SimpleKCC))] attribute and the initialization in Awake(). Removing it helps keep the FixedUpdateNetwork method concise.

[gemini-code-assist]

Avoid including hardcoded local file paths in public documentation. It is better to use a generic description of the source material to maintain professional standards and avoid leaking local environment details.

Suggested change

	*Local Source Reviewed: `C:\Users\JOY\Downloads\fusion-pirate-adventure-2.0.12.zip`*
	*Local Source Reviewed: Photon Fusion Pirate Adventure 2.0.12 sample package*