[Website] VerticaPy Website - Iteration 3 - Epic

[oualib]

What is the requested change?

The documentation is almost finalised, we need small improvement to make it better:

• Update time series page with BY parameters - @mail4umar
• Problems with the main pages videos. - @oualib
• Showcase Website: Pages for: Why VerticaPy? First Logo? History? Why Choose us? - @oualib
• Generating 5 minutes Videos for each User Guide Page. - @oualib
• Lazy Loading Mode to avoid high loading time when navigating through pages like Chart Gallery or classes. - @mail4umar
• User Guide: Rebuilding the user guide and adapting it to our current format (RST) - Next Step would be to add videos. - @mail4umar and @tconsigny
• Comparison Page 2: We should have a comparison page for aggregations, correlations and other statistical functions like tests or iv_woe ... - @mail4umar