Actually Article IIII section 2 of the constitution enumerates the power of the Supreme Court that I of original jurisdiction in causes where a state is the party, but the USSC can turf this to a lower federal court. However, the USSC is the court of EXCLUSIVE jurisdiction in cases where a state sues a state.
What bars Texas or florida or Alabama from filing lawsuit against the state if New York ok grounds that the legislature who appoints the electors are being violated by New York in not having the option of voting for Trump? Seems to me that in reading the rule book the USSC can be forced into takin up the issue.
Going the road of writ of common laws, it seems that it can be filed, but the court must grant cert. (4 justices). State v state compels to court to hear it.
The Texas Legislature has an absolute right to appoint 40 Trump Electors, they could do that right now in fact although those Electors could not vote until December.
Nothing NY has done or could do impairs the plenary power of appointing Electors for Texas that belongs to the Legislature.