Allah ligature issues

[moyogo]

• Diacritics on اللّٰه اللّٰہ اللّه اللّہ are duplicated and mispositioned when shadda or superscript alef are explicitely in the strings

• Diacritics are added to الله اللہ when they should probably not be added.

• FDF2 ﷲ should be added and look like اللّٰہ because اللّٰه looks like it.

See https://w3c.github.io/alreq/gap-analysis/tests/ligation/ligation_000.html

See also Unicode 15.0 ch. 9:

U+FDF2 ARABIC LIGATURE ALLAH ISOLATED FORM is a very common ligature, used to display the name of God. When the formation of the allah ligature is desired, the recommended way to represent the word would be <alef, lam, lam, shadda, superscript alef, heh> <0627, 0644, 0644, 0651, 0670, 0647>. In non-Arabic languages, other forms of heh, such as
heh goal (U+06C1), may also form the ligature. Extra care should be taken not to form the ligature in the absence of the shadda and the superscript alef, as the sequences <alef, lam, lam, heh> and <alef, lam, lam, shadda, heh> exist in Persian and other languages with different meanings or pronunciations, where the formation of the ligature would be incorrect
and inappropriate.