feat: Add config file

config.json.example

@@ -0,0 +1,7 @@
+{
+    "semester": "1092",
+    "moodle": {
+        "username": "學號",
+        "password": "密碼"
+    }
+}

config.py

@@ -0,0 +1,8 @@
+import json
+
+class CONFIG():
+    @staticmethod
+    def get():
+        with open('config.json') as fp:
+            data = json.load(fp)
+            return data