add an in-memory provider to avoid file usage

[Warkanlock]

chore(data): add an in-memory provider to avoid file usage

Introduction

Given the lack of an in-memory provider, this will allow users of the tool to consume from an already in-memory pd.DataFrame. This will enable a faster and more flexible approach than reading a binary file.

Change

Now, users can import an InMemoryProvider and use the data without paths

fundamental = pd.DataFrame()
targets = pd.DataFrame()

provider = InMemoryProvider(fundamental, targets)

Compatibility

This is in addition to the data providers that the library already has.