Adds pickaxe icon (#1890)

* Adds pickaxe icon

* Replace missing icon, haha 😅

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Co-authored-by: Karsa <karsa@sztaki.hu>

icons/pickaxe.json

@@ -0,0 +1,24 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "karsa-mistmere"
+  ],
+  "tags": [
+    "mining",
+    "mine",
+    "land worker",
+    "extraction",
+    "labor",
+    "construction",
+    "progress",
+    "advancement",
+    "crafting",
+    "building",
+    "creation"
+  ],
+  "categories": [
+    "tools",
+    "maps",
+    "gaming"
+  ]
+}

icons/pickaxe.svg

@@ -0,0 +1,16 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M14.531 12.469 6.619 20.38a1 1 0 1 1-3-3l7.912-7.912" />
+  <path d="M15.686 4.314A12.5 12.5 0 0 0 5.461 2.958 1 1 0 0 0 5.58 4.71a22 22 0 0 1 6.318 3.393" />
+  <path d="M17.7 3.7a1 1 0 0 0-1.4 0l-4.6 4.6a1 1 0 0 0 0 1.4l2.6 2.6a1 1 0 0 0 1.4 0l4.6-4.6a1 1 0 0 0 0-1.4z" />
+  <path d="M19.686 8.314a12.501 12.501 0 0 1 1.356 10.225 1 1 0 0 1-1.751-.119 22 22 0 0 0-3.393-6.319" />
+</svg>