Add a variant '7' button calculator needle

I *think* it gets shaded slightly when we have to click it twice
in a row, or something.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/gnome/apps/calculator/calc_button_seven-repeat-20231206.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "ypos": 421,
+      "xpos": 182,
+      "width": 28,
+      "height": 25,
+      "type": "match"
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "calc_button_seven"
+  ]
+}