feat(assets): add initial clothing set with all body type variants

Five placeholder clothing items fitted to all 11 body types via the
Surface Deform batch pipeline (60 GLBs total):
- coveralls_basic, jacket_utility, pants_cargo, shirt_henley, boots_work

Each item includes reference.glb, reference_mask.png, coverage.json,
and 11 body-type variant GLBs. All Surface Deform binds succeeded
with no Shrinkwrap fallbacks needed (#711).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/assets/characters/clothing/boots_work/coverage.json

@@ -0,0 +1,9 @@
+{
+  "hides": [
+    "foot_l",
+    "foot_r",
+    "leg_lower_l",
+    "leg_lower_r"
+  ],
+  "torso_variant": "full"
+}

client/assets/characters/clothing/coveralls_basic/coverage.json

@@ -0,0 +1,19 @@
+{
+  "hides": [
+    "torso",
+    "torso_upper",
+    "arm_upper_l",
+    "arm_upper_r",
+    "arm_lower_l",
+    "arm_lower_r",
+    "hand_l",
+    "hand_r",
+    "leg_upper_l",
+    "leg_upper_r",
+    "leg_lower_l",
+    "leg_lower_r",
+    "foot_l",
+    "foot_r"
+  ],
+  "torso_variant": "full"
+}

client/assets/characters/clothing/jacket_utility/coverage.json

@@ -0,0 +1,11 @@
+{
+  "hides": [
+    "torso",
+    "torso_upper",
+    "arm_upper_l",
+    "arm_upper_r",
+    "arm_lower_l",
+    "arm_lower_r"
+  ],
+  "torso_variant": "full"
+}

client/assets/characters/clothing/pants_cargo/coverage.json

@@ -0,0 +1,9 @@
+{
+  "hides": [
+    "leg_upper_l",
+    "leg_upper_r",
+    "leg_lower_l",
+    "leg_lower_r"
+  ],
+  "torso_variant": "full"
+}

client/assets/characters/clothing/shirt_henley/coverage.json

@@ -0,0 +1,9 @@
+{
+  "hides": [
+    "torso",
+    "torso_upper",
+    "arm_upper_l",
+    "arm_upper_r"
+  ],
+  "torso_variant": "full"
+}