Bot menu and new position and order management

[evgrmn]

This release includes first of all the bot menu, which is used for convenient bot management. Another big change is the new approach to managing bot positions and orders. In previous versions, the bot was limited to only one instrument and only one market. These restrictions have been removed. Now any bot can freely use many instruments from any connected exchange.

Some of the new features and improvements are listed below:

1. Bot menu is a manager that allows you to add a new bot, delete, change parameters, activate or pause the bot, merge bots, edit the bot strategy file.
2. Redesigned http.py to handle error codes from different exchanges.
3. New main menu widget.
4. New Bots class for managing bot data. Expanding the functionality of the bot, allowing the bot to trade on multiple exchanges and instruments.
5. Rebuilt the robots database table.
6. Added functionality for delivery after the instrument expires.
7. Redesigned the main page.
8. Subscribe and unsubscribe to instruments without restarting.
9. Simplified addressing of instrument classes as (symbol, market) instead of (symbol, category, market).
10. Added a new TICKER column to the coin and bot database tables.
11. The TreeviewTable class has been expanded to display information in a hierarchical order.
12. Improved error handling when initially loading data from exchanges.
13. Added a new Tool class containing bot functionality.
14. Redesigned kline controls.
15. Added control over strategy limits.

Next release topic: Connecting to Deribit exchange.

Full Changelog: 24.6.1...24.8.0

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