Trading-strategy

- Add lending reserves and candles universe.
Now you can easily download and explore Aave v3 lending rates
with functions available in `tradingstrategy.lending` module

- Change `PandasPairUniverse.get_pair_by_human_description()` signature
to be easier to use
- More user friendly data not available / 404 error handling for lending candles

- Add `exchange_universe` argument to `get_pair()`

- `GroupedCandleUniverse.create_from_single_pair_dataframe(time_bucket)` parameter added
- `TimeBucket.from_pandas_timedelta()` added

- Add support for fetching lending candle data with `fetch_lending_candles_by_reserve_id()`
- Rename `fetch_all_lending_protocol_reserves()` to `fetch_all_lending_reserves()`
- Delete `summarydataframe.py` and its dependents. This includes `backtrader.py` and the `TradeSummary.to_dataframe` method.
Backtrader has been unmaintained for a while.

- [Add loaded trading pair data preprocesing and working around Parquet data problems](https://github.com/tradingstrategy-ai/trading-strategy/issues/104)
- Add `DataDecodeFailed(Exception)` that gives more context information if there is something wrong
with the trading pair