documentation(wfntp - Activity Index): write a report overview for the activity index metric

[cnstll]

User Story

As a dev, I want to have a document on the activity index, so that I can understand the calculation of the Activity index and have an overview of the metric distribution.

Acceptance Criteria

• [ ] A report of the result about the activity Index obtain via several video is available in a file experiments/activity_index/report_overview/report_overview.md

Report Overview:

• [ ] A section about the data: short description of the list of images (add a screenshot to have an idea of what kind of images we have)
• [ ] A section about the methodology: remind the formular of the activity index, explaination of each measures, and how you plot the result (we used a script blablabla)
• [ ] A section result: mostly graph and some global statistic. We should at least see a scatterplot with point being value of activity index, one color per source (all the point of the activity index of one video is one color).
• [ ] all the output obtained via WF NTP

Definition of Done

• [ ] Product Owner accepts the User Story
• [ ] Acceptance criteria met
• [ ] New data has been dvc push

Defined by CICD:

• Code reviewed
• black compliant
• Unit tests passed
• Functional tests passed
• Non-Functional requirements met