Add charting tool

[Geukers]

Allow user to view metrics such as price.

[TristanFecteau]

We could use https://streamlit.io/ to create a local site which would help a backtester visualize it's stats.
Candlestick chart in streamlit with plotly : https://docs.streamlit.io/library/api-reference/charts/st.plotly_chart

[TristanFecteau]

Added @Maxew42 to the issues since he seems to know streamlit

[Maxew42]

Streamlit is an easy web app development library that uses python.
However, a good visualization tool relies on a good logging one.
We thus need to create a log format that matches the following constraints :

• Compatibility: The storage format must be compatible with future changes
• Sparsity : The storage format must be as divided as possible, in order to reduce the loading time.
• Expandability : The user must be able to add it's own statistics ( scalar, arrays, special types ) to the format during the training.
• Organizability : The user must be able to name and organize his different strategic experiments in subdirectories.

Regarding the vizualisation app itself :

• Compatibility with the statistics the user has created himself. Depending on the type of these statistics different viewing option must be proposed to the user.
• The latency must be kept as low as possible (that is the only down side of streamlit btw).
• The available vizualisation tools must be exaustive.

[Maxew42]

Integrate the updates in #117, #116 and #115 when needed.