[Feat] Add MA calculate

[henchiyb]

PR Description

We need a way to calculate the moving average of the specific time range, so I added this method to calculate moving average of a stock by close price get from stock_historical_data

Check list

• [x] Add feature: Add MA calculate
• [ ] Adding unit tests

How did I test it?

Local

Screenshots or Test results

calculate_moving_average('VNM', date.today().strftime('%Y-%m-%d'), 10)
=> 73530.0

Reviewer Considerations

• Migrations & changes are backward compatible