feat(lab): added soldering-iron icon (#4850)

* feat(icons): add soldering iron

* fix(icons): consolidate soldering iron use cases

* fix(icons): refine soldering iron geometry

* fix(icons): update soldering iron design and credits

* Update soldering-iron.json

removed solder tag, since part of the name

* Move `soldering-iron` icon to lab

---------

Co-authored-by: Peter Jamrozinski <peter.jamrozinski@johnsonfit.com>
Co-authored-by: Karsa <contact@karsa.org>
Co-authored-by: Eric <eric.fennis@gmail.com>

lab/soldering-iron.json

@@ -0,0 +1,30 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "psjdev",
+    "karsa-mistmere"
+  ],
+  "use-cases": [
+    "Representing electronics assembly and repair",
+    "Indicating circuit-board rework or modification",
+    "Marking soldering steps in repair instructions",
+    "Marking hot-tip hazards in safety documentation"
+  ],
+  "tags": [
+    "electronics",
+    "repair",
+    "circuit",
+    "heat",
+    "workshop",
+    "assembly",
+    "pcb",
+    "flux",
+    "desolder",
+    "rework",
+    "smd",
+    "diy"
+  ],
+  "categories": [
+    "tools"
+  ]
+}

lab/soldering-iron.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="M11.356 9.356a1.2 1.2 0 010-1.712l.351-.351A1 1 0 0112.414 7h1.172a1 1 0 00.707-.293l3.351-3.351a1.2 1.2 0 011.712 0l1.288 1.288a1.2 1.2 0 010 1.712l-3.351 3.351a1 1 0 00-.293.707v1.172a1 1 0 01-.293.707l-.351.351a1.2 1.2 0 01-1.712 0z" />
+  <path d="m11.5 9.5-7.243 7.244a2 2 0 00-.407.586l-1.798 3.956a.5.5 0 00.662.662L6.67 20.15a2 2 0 00.586-.406L14.5 12.5" />
+  <path d="m20 4 .293-.293A2.4 2.4 0 0122 3" />
+  <path d="M3 2q2 2.5 0 5 -2 2.5 0 5" />
+</svg>