BED-8194: Restore dashboard/notebook and add generic notebook support

[d3vzer0]

Description

Before the initial release a Marimo notebook was created to inspect collection metrics and preview opengraph generation for collectors. This PR adds the notebook back to the repo and adds generic support to load notebooks via the CLI.

Motivation and Context

Notebooks are useful for inspecting collection metrics and debugging issues with OpenGraph conversion.

How Has This Been Tested?

• Added unit test to verify if the notebook runs without any errors and checks if the openhound_faker collection returns a dataframe with the "prop_hostname" values (which indicates that the raw resource was succesfully converted to OG)

Screenshots (if appropriate):

Types of changes

• Chore (a change that does not modify the application functionality)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)