Add JAL and change some of the formatting on previous instructions to be cleaner

src/instructions.rs

@@ -29,6 +29,7 @@ pub(crate) fn find_and_exec(instr: Instruction, core: &mut Core) -> Option<Instr
             _ => None,
         },
         0b01101 => Some(rvi::lui(core, instr)),
+        0b11011 => Some(rvi::jal(core, instr)),
         _ => None,
     }
 }