Phase 7: netfox + godot-jolt stack upgrade

Stack installed:
- netfox v1.35.3 (core + extras + noray + internals)
- godot-jolt v0.16.0-stable

Architecture:
- Server: ENet transport (works headless, no netfox deps)
- Client/Editor: netfox rollback (RollbackSynchronizer, TickInterpolator)

New/modified:
- docs/migration-netfox-plan.md — migration architecture
- scripts/network/network_manager.gd — netfox-aware ENet fallback
- scripts/network/player.gd — clean base player
- client/characters/player_netfox.gd — rollback player w/ WeaponManager
- client/characters/input/player_net_input.gd — BaseNetInput subclass
- client/characters/character/fps_character_controller.gd — netfox input feed
- client/weapons/ — weapon data, registry, TacticalWeaponHitscan, WeaponManager
- client/scripts/round_replicator.gd — client-side round state bridge
- server/scripts/round_manager.gd — improved state machine
- server/scripts/plugin_api/plugin_manager.gd — refined plugin system
- config: enemy_tag, ally_tag for meatball targeting

Removed: old C++ SimulationServer GDExtension (replaced by netfox rollback)

server/server-browser-api/venv/lib/python3.11/site-packages/uvloop/_version.py

@@ -0,0 +1,13 @@
+# This file MUST NOT contain anything but the __version__ assignment.
+#
+# When making a release, change the value of __version__
+# to an appropriate value, and open a pull request against
+# the correct branch (master if making a new feature release).
+# The commit message MUST contain a properly formatted release
+# log, and the commit must be signed.
+#
+# The release automation will: build and test the packages for the
+# supported platforms, publish the packages on PyPI, merge the PR
+# to the target branch, create a Git tag pointing to the commit.
+
+__version__ = '0.22.1'