pic16f628a successfully programmed but not working
You're setting A0 to be an output, then you're blinking A1.  Which is it? A0 or A1?  Make your mind up, and then make them both the same.

Another thing I notice on your schematic.  You're setting the oscillator to be HS, yet I'm not seeing ant crystal or loading caps on your schematic.  Did you just omit them from that drawing, or do they truly not exist?

The same goes for the (missing) obligatory decoupling capacitor on the power pin.