Resolve "Implement Trailing take profit orders"

[btschwertfeger]

Following the high-level concept created in #15, this MR provides the technical solution for the trailing take profit mechanism that can be optionally employed to achieve higher selling prices and thus higher profits, while still following the grid-like approach.

ToDo's:

• Implement the trailing stop profit mechanism
• Test the trailing stop profit mechanism
• Update the documentation
• Test with real money for some time
• No tsp for partially filled orders
• Add caching for orderbook and tsp table
• No TSP for cDCA
• When starting from scratch DB but there are orders in the upstream, the first notification shows no orders, even though the logs shows that the local orderbook was updated
• Check if that infers with post-only buy orders

Closes #13