feat(icons): added square-dashed-plus (#4849)

* feat(icons): added square-dashed-plus

* Update icons/square-dashed-plus.json

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update icons/square-dashed-plus.json

Suggested by PR AI

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update icons/square-dashed-plus.json

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Revise use cases for square dashed plus icon

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---------

Co-authored-by: Peter Jamrozinski <peter.jamrozinski@johnsonfit.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

icons/square-dashed-plus.json

@@ -0,0 +1,36 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "llaenowyd",
+    "mishkaio",
+    "ericfennis",
+    "karsa-mistmere",
+    "chessurisme",
+    "colebemis",
+    "psjdev"
+  ],
+  "use-cases": [
+    "Prompting users to select content for an empty slot",
+    "Adding an area to an existing selection in design editors",
+    "Marking a placeholder where users can add a block"
+  ],
+  "tags": [
+    "selection",
+    "select",
+    "add",
+    "new",
+    "placeholder",
+    "marquee",
+    "box",
+    "dashed",
+    "plus",
+    "insert",
+    "frame",
+    "empty"
+  ],
+  "categories": [
+    "design",
+    "layout",
+    "shapes"
+  ]
+}

icons/square-dashed-plus.svg

@@ -0,0 +1,26 @@
+<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="M5 3a2 2 0 0 0-2 2" />
+  <path d="M19 3a2 2 0 0 1 2 2" />
+  <path d="M21 19a2 2 0 0 1-2 2" />
+  <path d="M5 21a2 2 0 0 1-2-2" />
+  <path d="M9 3h1" />
+  <path d="M9 21h1" />
+  <path d="M14 3h1" />
+  <path d="M14 21h1" />
+  <path d="M3 9v1" />
+  <path d="M21 9v1" />
+  <path d="M3 14v1" />
+  <path d="M21 14v1" />
+  <path d="M8 12h8" />
+  <path d="M12 8v8" />
+</svg>