chore(piece): change queen and king sprite

Signed-off-by: Mauran <thomas.mauran@etu.umontpellier.fr>

Author: Mauran

examples/demo.gif

@@ -106,11 +106,11 @@ impl Position for King {
 impl King {
     pub fn to_string() -> &'static str {
         "\
-    \n\
       ✚\n\
     ▞▀▄▀▚\n\
     ▙▄█▄▟\n\
     ▐███▌\n\
+   ▗█████▖\n\
     "
     }
 

examples/helper.gif

@@ -65,10 +65,10 @@ impl Queen {
     pub fn to_string() -> &'static str {
         "\
     \n\
-    ○○○○○\n\
-    ▙▙█▟▟\n\
-    ▐▄▄▄▌\n\
-    ▐███▌\n\
+◀█▟█▙█▶\n\
+  ◥█◈█◤\n\
+  ███\n\
+▗█████▖\n\
     "
     }
 }