Document how to connect Giraffe to InfluxDB using Flux

Currently there's no documentation on how to pull data from InfluxDB using Flux and visualize it in Giraffe. It would be great to have an end-to-end tutorial on how to connect a React app to InfluxDB, run a Flux query against it, and visualize it in Giraffe.

Start by reviewing the repository's existing documentation and Giraffe usage patterns, then identify how a React app should connect to InfluxDB and run a Flux query. The tutorial is done when it covers the full path from connection through query execution to visualization in Giraffe.

Written by the indexing model from the issue text.