Add a system for char selection, creation and deletion

[bierdosenhalter]

<leaf name="CREATE_CHAR"
          description="The client creates a character, type is $u32, and name is $s" />
<leaf name="SELECT_CHAR" />
<leaf name="DELETE_CHAR"
          sendto="EGS"
          format="u8"
          description="The client delete a character, slot of character is $u8" />
<leaf name="RENAME_CHAR"
          format="u8 s s"
          description="The client rename a character, $u8 : slot of character $s : name $s : surname" />

[bierdosenhalter]

char creation action handler is implemented