Adds handshake icon (#1835)

* Adds handshake icon

* update handshake icon

* Update handshake.svg

* Update icons/handshake.json

Co-authored-by: Jakob Guddas <github@jguddas.de>

---------

Co-authored-by: Rigó József Karsa <karsa@sztaki.hu>
Co-authored-by: Eric Fennis <eric.fennis@gmail.com>
Co-authored-by: Jakob Guddas <github@jguddas.de>

icons/handshake.json

@@ -0,0 +1,25 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "karsa-mistmere",
+    "ericfennis"
+  ],
+  "tags": [
+    "agreement",
+    "partnership",
+    "deal",
+    "business",
+    "assistance",
+    "cooperation",
+    "friendship",
+    "union",
+    "terms"
+  ],
+  "categories": [
+    "account",
+    "social",
+    "communication",
+    "money",
+    "security"
+  ]
+}

icons/handshake.svg

@@ -0,0 +1,17 @@
+<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="m11 17 2 2a1 1 0 1 0 3-3" />
+  <path d="m14 14 2.5 2.5a1 1 0 1 0 3-3l-3.88-3.88a3 3 0 0 0-4.24 0l-.88.88a1 1 0 1 1-3-3l2.81-2.81a5.79 5.79 0 0 1 7.06-.87l.47.28a2 2 0 0 0 1.42.25L21 4" />
+  <path d="m21 3 1 11h-2" />
+  <path d="M3 3 2 14l6.5 6.5a1 1 0 1 0 3-3" />
+  <path d="M3 4h8" />
+</svg>