encoder: add conversion of uppercased letters

encoder.c

@@ -28,6 +28,23 @@ static const struct encoder_tuple table[] = {
 	{"s.", "ṣ"},
 	{"m.", "ṃ"},
 	{"h.", "ḥ"},
+
+	{"A-", "Ā"},
+	{"I-", "Ī"},
+	{"U-", "Ū"},
+	{"R.", "Ṛ"},
+	{"R.-", "Ṝ"},
+	{"L.-", "Ḹ"},
+	{"N^.", "Ṅ"},
+	{"N~", "Ñ"},
+	{"S,", "Ś"},
+	{"T.", "Ṭ"},
+	{"D.", "Ḍ"},
+	{"N.", "Ṇ"},
+	{"S.", "Ṣ"},
+	{"M.", "Ṃ"},
+	{"H.", "Ḥ"},
+
 	{NULL, NULL}
 };