P14-02: Split warps into guest FRONT and staff BACK service warp (A08)

The FRONT Mana warp is guest-only: its connectors carry the "!staff" access,
which path access checks treat as open to everyone except staff. A new 2x2
BACK service warp links only to other service warps for staff, with A07
values. Registry and palette now hold 25 definitions.

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

data/facilities/infrastructure/mana_warp.tres

@@ -6,7 +6,7 @@
 script = ExtResource("1")
 id = &"mana_warp"
 display_name = "マナワープ"
-description = "建設済みの全ワープと瞬時につながる表層の転移陣。客と接客中の従業員が1回3マナで移動する。"
+description = "建設済みの表層ワープ同士を瞬時につなぐ客用の転移陣。客が1回3マナで移動する。従業員は裏層の業務用ワープを使う。"
 zone = 0
 layer = 0
 footprint = Vector2i(2, 2)