Add practice range: shooting, AK47, intro cinematic, dressed warehouse scene

- PortalTestDestination practice range: Valorant-style hitscan rifle (recoil,
  spray/bloom, reload, controller support), debug HUD, practice-dummy targets
  with head/body hitboxes, hit/death/respawn animations, procedural SFX/FX
- AK47 model (Quaternius, CC0) held via Animator IK, with fire/reload/equip anims
- Intro cinematic (camera shots, title card, target beam-in, GO hand-off)
- Scene dressing editor pass: CC0 textures, props, warehouse roof, lighting and
  post-processing; custom stylized skybox shader
- CharacterMovement: camera recoil, shoulder offset, cinematic control lock
- Unity CLI pipeline package; plus in-progress chat/Rive/player changes

Asset credits: Assets/Models/Props/PROPS_CREDITS.txt (3 CC-BY 3.0 props),
Assets/Textures/Range/TEXTURES_LICENSE.txt, Assets/Resources/*/..._LICENSE.txt

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Assets/Textures/Range/TEXTURES_LICENSE.txt

@@ -0,0 +1,9 @@
+Textures from Poly Haven (https://polyhaven.com) — CC0 1.0, public domain, no attribution required.
+asphalt_02: https://polyhaven.com/a/asphalt_02
+brick_wall_001: https://polyhaven.com/a/brick_wall_001
+brushed_concrete: https://polyhaven.com/a/brushed_concrete
+hangar_concrete_floor: https://polyhaven.com/a/hangar_concrete_floor
+clay_plaster: https://polyhaven.com/a/clay_plaster
+rough_wood: https://polyhaven.com/a/rough_wood
+wood_planks: https://polyhaven.com/a/wood_planks
+metal_plate: https://polyhaven.com/a/metal_plate