Support more commands

[koppor]

Just as a note, maybe someone can work on this

• \i InputError(errorCode=TTEC00,slice=FrozenSlice(range=[0,2), value='\i'),arguments=[i])
• \"{\i} InputError(errorCode=TTEC00,slice=FrozenSlice(range=[3,5), value='\i'),arguments=[i])
• \\\"{\\i}". InputError(errorCode=TTEC00,slice=FrozenSlice(range=[3,5), value='\i'),arguments=[i]). Note that {\"{i}} works
• {\O}ie, Gunvor InputError(errorCode=TTEC00,slice=FrozenSlice(range=[1,3), value='\O'),arguments=[O])
• Mali\'{n}ski InputError(errorCode=TDETA2,slice=FrozenSlice(range=[4,9), value=''{n}'),arguments=[n])
• 1\textsuperscript{st} InputError(errorCode=TTEC00,slice=FrozenSlice(range=[1,17), value='\textsuperscript'),arguments=[textsuperscript]
• \L\k{e}ski InputError(errorCode=TTEC00,slice=FrozenSlice(range=[0,2), value='\L'),arguments=[L])

[koppor]

Maybe https://github.com/zauguin/luamml could be of help.