Icon lookup for SIGs in preparation for #47. Improved ZLOTA spotter lookup.

data/sig.py

@@ -0,0 +1,12 @@
+from dataclasses import dataclass
+
+# Data class that defines a Special Interest Group.
+@dataclass
+class SIG:
+    # SIG name, e.g. "POTA"
+    name: str
+    # Description, e.g. "Parks on the Air"
+    description: str
+    # Icon to use for it, from the Font Awesome set. This is fairly opinionated but is here to help the Spothole web UI
+    # and Field Spotter. Does not include the "fa-" prefix.
+    icon: str