Add lud transliteration

Ludic alphabet is abcčdefghijklmnoprsšzžtuvüäö’ according to Lüüdilaine, 2013 (ISSN 1796-7384).

Wikipedia [claims](https://en.wikipedia.org/wiki/Ludic_language) Ludic uses [Karelian Alphabet](https://en.wikipedia.org/wiki/Karelian_alphabet#Current_Karelian_alphabet_.282007.E2.80.93.29) but the one presented there is different.