Implement project saving

project.py

@@ -25,5 +25,17 @@ class Project:
             self.loaded=True
 
 
+    def save(self,path):
+        # save project data to file
+        with open(path, "w") as f:
+            json.dump({
+                "char_width": self.char_res[0],
+                "char_height": self.char_res[1],
+                "chars": self.chars
+            }, f, indent=4)
+        self.path=path
+        self.loaded=True
+
+
     def does_char_exist(self,c):
         return chr(c) in self.chars