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/Player.prefab

@@ -16,7 +16,7 @@ GameObject:
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-  m_TagString: Untagged
+  m_TagString: Player
   m_Icon: {fileID: 0}
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@@ -92,6 +92,7 @@ MeshRenderer:
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+  m_MaskInteraction: 0
   m_AdditionalVertexStreams: {fileID: 0}
 --- !u!136 &2664288241509133771
 CapsuleCollider:
@@ -264,6 +265,7 @@ MeshRenderer:
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   m_SortingLayer: 0
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+  m_MaskInteraction: 0
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 --- !u!102 &680090071925963054
 TextMesh: