Add materials icons (lucide-icons#1407)

* Add `fence` icon

* Add `anvil` (metal) icon

* Add `brick-wall` icon

* Refine `anvil` icon

* Update icons/anvil.json

Co-authored-by: Karsa <contact@karsa.org>

* Update icons/brick-wall.json

Co-authored-by: Karsa <contact@karsa.org>

* Add `panel` icon

* Refine `brick-wall` icon

* Rename `panel` to `inspection-panel`

---------

Co-authored-by: Karsa <contact@karsa.org>
Co-authored-by: Eric Fennis <eric.fennis@gmail.com>

icons/anvil.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "danielbayley"
+  ],
+  "tags": [
+    "metal",
+    "iron",
+    "alloy",
+    "materials",
+    "heavy",
+    "weight",
+    "blacksmith",
+    "forge",
+    "acme"
+  ],
+  "categories": [
+    "buildings",
+    "tools",
+    "gaming"
+  ]
+}

icons/brick-wall.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "danielbayley"
+  ],
+  "tags": [
+    "bricks",
+    "mortar",
+    "cement",
+    "materials",
+    "construction",
+    "builder",
+    "labourer",
+    "quantity surveyor",
+    "blocks",
+    "stone"
+  ],
+  "categories": [
+    "buildings",
+    "home"
+  ]
+}

icons/fence.json

@@ -0,0 +1,21 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "danielbayley"
+  ],
+  "tags": [
+    "picket",
+    "panels",
+    "woodwork",
+    "diy",
+    "materials",
+    "suburban",
+    "garden",
+    "property",
+    "territory"
+  ],
+  "categories": [
+    "home",
+    "buildings"
+  ]
+}

icons/inspection-panel.json

@@ -0,0 +1,17 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "danielbayley"
+  ],
+  "tags": [
+    "access",
+    "cover",
+    "tile",
+    "metal",
+    "materials",
+    "screws"
+  ],
+  "categories": [
+    "tools"
+  ]
+}