Request a new event to be notified that the #function is missing

[dzpao]

If a long piece of code (e.g. more than 1000 lines) is running without a base function, the result will be incorrect, but it will be difficult for the user to find and correct it. This is possible in compiled languages with compile checking, but for TinTin++ I think it would be better to add an event.

Similarly maybe there are missing variables, or possibly other scenarios that I'm not think of.

[scandum]

Not a bad idea, I'll make a note on my todo list.

[scandum]

I took a look, but it's difficult to handle, and there will be many cases where there are false positives.

I've been meaning to extend syntax highlighting support, and I've added a note to highlight missing variables/functions.