FIREWORK!

Add pack.png and update README.md by @Mxpea in #8 Dev_mx by @Mxpea in #10 Refactor ray functionality: gradually remove redundant UUID handling logic and update related function calls by @Mxpea in #11 Update ray_process.mcfunction: fix function call by changing ray_step_target to ray_step_facing by @Mxpea in #12 Dev_mx by @Mxpea in #13 Update README.md: refactor main features section, optimize descriptions, and add run entry points and key subdirectory information by @Mxpea in #14