Better documentation for components usage

[olayway]

Description

It seems it can be difficult to create some charts using our current components set. While it is possible to create almost any component you want with our Plotly or Vega wrapper components, it's not obvious for people who have never heard of these two packages.

Tasks

• look for existing information in our current docs/blog posts on creating charts
• propose improvements
• apply

Notes

From Cesar's feedback on using DataHub Cloud:

For future developments of DataHub, I would like to use components that are not currently available such as horizontal bar charts, line charts with over one line, stacked bar charts, or scatter plots, just to mention four specific examples. The latter is ideal for graphic relationships between two numeric variables, e.g., the correlation between gross domestic product and life expectancy.

It would also be interesting to format chart components in terms of color (it only shows blue at the moment), the thickness of the bar or line, and the possibility of incorporating features like a legend, a summary beyond the title of the chart or mentioning the source of the data in the footer.