started working on string literals

lexer.py

@@ -146,6 +146,8 @@ class Lexer:
 				tok = self.__new_token(TokenType.COLON, self.current_char)
 			case ",":
 				tok = self.__new_token(TokenType.COMMA, self.current_char)
+			case '"':
+				tok = self.__new_token(TokenType.STRING, self.__read_string())
 			case None:
 				tok = self.__new_token(TokenType.EOF, "")
 			case _:
@@ -162,4 +164,13 @@ class Lexer:
 					tok = self.__new_token(TokenType.ILLEGAL, self.current_char)
 
 		self.__read_char()
-		return tok
+		return tok
+	
+	def __read_string(self):
+		position: int = self.position + 1
+		while True:
+			self.__read_char()
+			if self.current_char == '"' or self.current_char is None:
+				break
+
+