chore(client): update all dependencies and resolve compatibility changes

[RZDESIGN]

Summary

• Update all direct client dependencies/devDependencies to latest versions.
• Upgrade rendering/toolchain stack, including:
  • three to ^0.183.2
  • @types/three to ^0.183.1
  • vite to ^7.3.1
  • typescript to ^5.9.3
• Update additional runtime/docs dependencies (@hytopia.com/lib, @msgpack/msgpack, msgpackr, obscenity, API extractor/documenter).
• Remove deprecated @types/mixpanel-browser (stub package no longer needed).

Compatibility fixes included

• NetworkManager: normalize packed packet buffers to plain Uint8Array for latest TS/lib typings and stream writer compatibility.
• heartbeat service: adapt HYTOPIAClient initialization to current constructor args shape.
• Keep Three.js compatibility adjustments needed for current client code paths (postprocessing/type-safety related updates).

Validation

• npm outdated in client reports no outdated direct packages.
• npm run build in client passes successfully.

Notes

• This is a broad dependency refresh (includes major upgrades), so runtime smoke checks are recommended for:
  • game startup/loading
  • networking/input/chat
  • GLTF/model + texture loading
  • post-processing pipeline (outline/bloom/SMAA)