mips 模拟器 5断流水线，支持断点 stall flush-mips simulator 5 off the assembly line, support breakpoint stall flush

实现一个具有5段流水线结构的Mips-lite模拟器，该模拟器结构具有data forwarding，stall 处理等功能-The realization of a pipeline structure with paragraph 5 of the Mips-lite simulator, the simulator structure of data forwarding, stall and other functions to

The simulator can run the following subset of the MIPS instruction set in the format described -> add $rd $rs $rt [immediate value can be given instead of $rs & $rt] -> sub $rd $rs $rt [immediate value ca