docs: hit-counter 추가

Author: HyunJinNo

README.md

@@ -8,7 +8,7 @@
 
 <div align="center">
 
-<!-- [![Hits](https://hits.seeyoufarm.com/api/count/incr/badge.svg?url=https%3A%2F%2Fgithub.com%2FTripInfoWeb%2Fsolitour-frontend&count_bg=%2379C83D&title_bg=%23555555&icon=&icon_color=%23E7E7E7&title=hits&edge_flat=false)](https://hits.seeyoufarm.com) -->
+[![Hits](https://hits.seeyoufarm.com/api/count/incr/badge.svg?url=https%3A%2F%2Fgithub.com%2FTripInfoWeb%2Fsolitour-frontend&count_bg=%2379C83D&title_bg=%23555555&icon=&icon_color=%23E7E7E7&title=hits&edge_flat=false)](https://hits.seeyoufarm.com)
 
 </div>