WIP: added validate view

app/main/views/validate.py

+from app.main import main
+from app.main.utils.common import response_message, read_data, read_rules, write_validations
+from rulemall import RulesGroup
+
+
+@main.route('/validate', methods=['GET', 'POST'])
+def validate():
+    data = read_data()
+    rules = read_rules()
+    rs = RulesGroup(data=data, rules=rules)
+    validation = rs.validate()
+    result = write_validations(validation, table_name='sample_data')
+    return response_message(result)