[Demo Feedback] - Clearer indications of when forecast is different from real

[amehta-scottlogic]

Acceptance Criteria

• Use existing AQI band colouring in summary table for pollutant values (discuss)
• Include a toggle that flicks between:
  • Colour the pollutants that correspond to the maximum difference between forecast and measured overall AQI. I.e. if Overall AQI diff is 3 and pollutant1 has a AQI diff of 3, pollutant2 has a diff of 1, and pollutant3 has a diff of 3, pollutants 1 and 3 are coloured with their corresponding AQI level. AQI values are always highlighted.
  • All pollutant value grid cells coloured and AQI values
• The colours correspond to the chart : https://ecmwf-projects.github.io/copernicus-training-cams/proc-aq-index.html
• Make it clear in diff column whether forecast is under/overperforming
  • +/- sign should do it