Tandem Palladium/Charcoal-Copper(I) Iodide (Pd/C-Cui) Catalyzed Sonogashira Coupling and Intramolecular Cyclization from 2-Bromonicotinic Acid (=2-Bromopyridine-3-Carboxylic Acid) and Ethynylarenes to 4-Azaphthalides (=Furo[3,4-B]Pyridin-5(7H)-Ones) and 5-Azaisocoumarins (=5H-Pyrano[4,3-B]Pyridin-5-Ones)