[FEATURE] Write simC code for question 91

[frankhart2018]

Question

Check if number contains three adjacent increasing digits or not.

Where to put the code?

In simc-codes directory

What to name the file?

q91.simc

Note: You can only start doing a question if it has been assigned to you by a maintainer. Once assigned to someone this questions will not be reassigned, it can only be reassigned if the person does not complete his/her task."