/portfolio/po : allow getting plotly figure with the SDK

[Chavithra]

Description

Updating the menu /portfolio/po to return a plotly.graph_objs._figure.Figure instead of a of displaying a matplotlib chart.

The plotly.graph_objs._figure.Figure is just an image of the matplotlib chart.

Example:

from openbb_terminal.sdk import openbb
d = {
            "SECTOR": {
                "AAPL": "INFORMATION TECHNOLOGY",
                "MSFT": "INFORMATION TECHNOLOGY",
                "AMZN": "CONSUMER DISCRETIONARY",
            },
            "CURRENT_INVESTED_AMOUNT": {
                "AAPL": "100000.0",
                "MSFT": "200000.0",
                "AMZN": "300000.0",
            },
            "CURRENCY": {
                "AAPL": "USD",
                "MSFT": "USD",
                "AMZN": "USD",
            },
        }
p = openbb.portfolio.po.load(symbols_categories=d)
fig = openbb.portfolio.po.ef_chart(portfolio_engine=p, external_axes=True)
fig.show()

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (develop@6a26d4e). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

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