Once Arch Manning jogged onto the field, the crowd at DKR-Texas Memorial Stadium rose to see the highly-rated and highly-touted five-star quarterback in action. He delivered in a big way. [Sign up for Inside Texas and get the BEST Longhorns scoop!] The 6-foot-4, 220-pound New Orleans (La.) Isidore Newman product escaped the pocket on his first drive and hit Silas Bolden during a scramble for his first touchdown as a Longhorn on Saturday vs Colorado State. With the Longhorns leading, 38-0, late in the third quarter, Steve Sarkisian pull starting quarterback Quinn Ewers from the contest after an…