feat(controllers): #60 shooter — ludic.shooter package (base + extensible)

Top-down shooter: TopDown decoupled move/aim (mouse/stick/move-dir/auto-aim),
a name-keyed Weapon registry (fire-rate/spread/pellets/pattern + data-driven
pierce/homing), and a self-contained deterministic Projectile pool with
faction-filtered Combat hits, pierce, ring/spiral patterns, and homing. One
weapon impl serves player + NPC via a want_fire intent. Budgeted wave Spawner.
Reuses ludic.gameplay Faction/Combat/Stats. 11-check example, in the suite.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/ludic.shooter/package.ludic

@@ -0,0 +1,16 @@
+# ludic.shooter — the builtin top-down Shooter controller (#60).
+#
+# A twin-stick / mouse-aim character whose movement is decoupled from aim, a
+# data-driven weapon registry, and a general projectile system (pierce / bounce /
+# homing / bullet-hell patterns), all conforming to the six-lever contract (#57).
+# Reuses the engine Body/Collider and the ludic.gameplay Faction + Combat + Stats
+# foundation: the SAME weapon/projectile systems drive a player and an NPC (the AI
+# writes the "fire" intent instead of input), so there is no duplicate enemy-gun
+# code. Deterministic integer/fixed maths throughout, so bullet patterns replay.
+package "ludic.shooter"
+version "0.1.0"
+kind source
+provides "TopDown"
+provides "Weapon"
+provides "Spawner"
+require "ludic.gameplay" "0.1.0"