Extend description

[peterdesmet]

The current description is:

Explore and visualize Camera Trap Data Packages (Camtrap DP https://camtrap-dp.tdwg.org/). With camtraptor you can get summaries of observed species and deployment information, and visualize these summaries on an interactive map.

I think we should extend this a bit:

• Describe the 4 step workflow
• Make clear to users why they would want to use camtraptor (vs camtrapdp)
• Read camtrapdp description to compare
• Mention other functionality (see reference list, e.g. camtrapR compatibility)