ar: add replacement rules from specific Hamza to standard Hamza

dictsource/ar_rules

@@ -46,12 +46,20 @@
      ،       ,
      ؛       ;
 
+// Multicharacters into single characters
+
+      ٰٔ       أ   // Superscript alef with Hamza above > Alef with hamza above
+
 // Reorder diacritics in "canonical order"
 
       َّ        َّ   // Fatha Shadda > Shadda Fatha
       ِّ        ِّ   // Kasra Shadda > Shadda Kasra
       ّْ        ّْ   // Sukun Shadda > Shadda Sukun
 
+// Specific glyphs into standard symbols
+      ٔ       ء   // Hamza above > Hamza
+      ٕ       ء   // Hamza below > Hamza
+
 // Named letter groups:
 // list of short vowels
 // A:  َ  ُ  ِ