Initial install method implementation

mcfs.py

@@ -1,5 +1,6 @@
 import os
 from sys import platform
+import shutil
 
 def __get_mc_dir():
     directory = ""
@@ -35,5 +36,9 @@ def is_path_exist(path:str):
 def is_standart_dir_structure():
     return not os.path.exists(os.path.join(directory, "home"))
 
+def install(filename):
+    shutil.copy2(os.path.join(cache_dir,filename),\
+               os.path.join(mc_dir,"mods",filename))
+
 mc_dir = __get_mc_dir()
 cache_dir = __get_cache_dir()