Add/update README in all UI components

[ke4]

I reviewed all components in our atlas-components repo.
Some of the components has not got any README, some are outdated.
We need to create or update them.
Please tick each the subtask that you have finished (commit modification and published):

Subtasks:

• atlas-anatomogram-experiment-table
• atlas-bioentity-information
• atlas-experiment-table
• atlas-homepage-cards
• atlas-information-banner
• atlas-react-fetch-loader
• atlas-scientific-notation-number
• atlas-smileys-feedback-form
• highcharts-series-generator
• react-ebi-species
• scxa-cell-type-wheel-experiment-heatmap
• scxa-cell-type-wheel
• scxa-faceted-search-results-v5
• scxa-faceted-search-results
• scxa-gene-search-form
• scxa-marker-gene-heatmap
• scxa-tsne-plot
• scxa-tsne-widget