feat: detect local artists, rgs and releases

src/awk/artists.awk

@@ -1,8 +1,16 @@
-BEGIN { OFS="\t" }
-$2 == "Group" { name = format_group }
-$2 != "Group" { name = format_person }
+BEGIN { 
+  OFS="\t"
+  local_artists[0] = 0
+  delete local_artists[0]
+  while ((getline < file_local_artists) == 1) 
+    local_artists[$1] = 1
+  close(file_local_artists)
+}
 { 
   gsub("&", "\\\\&")
+  name = $2 == "Group" ? format_group : format_person
+  if (local_artists[$1])
+    name = format_local name
   if ($4)
     name = name " " format_disambiguation
   sub("<<disambiguation>>", $4, name)