[icebox] interesting but out of scope tasks

[markov00]

This list covers interesting and useful tasks/feature requests for the library.
We can't currently dedicate enough and meaningful time to these tasks but we like to collect them here as they are definitely interesting and worth pursuing. We will close them soon as not currently planned but there are chances to revive them 🧟 in a later future.

Icebox

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1. Add a general strategy to deal with defaults interactions like the hover interaction on legend items #56
   :interactions discuss enhancement +3
2. Export as JS Snippet #57
   :export enhancement kibana cross issue +3
3. Nested terms aggregations in legend #223
   :legend enhancement +2
4. Group series on legend #295
   :legend enhancement +2
5. Interactive Charts to enable Machine Learning Interpretability for Elastic ML #576
   :new chart type +1
6. Add annotations to the legend #555
   :legend enhancement +2
7. Inplace editing for axis titles #753
   :all :axis :interactions enhancement kibana cross issue +5
8. "Composite" annotations #1200
   :annotation :xy enhancement kibana cross issue +4
9. Add Support for Radar Charts #1147
   :new chart type enhancement +2
10. Configurable starting day of week #1466
    :axis :xy enhancement kibana cross issue +4
11. Buildkite CI improvements #1617
    :ci enhancement internal meta +4
12. XY Annotations #1579
    :annotation :xy enhancement meta +4
13. Cluster node performance (storage, heap and CPU) #1536
    :new chart type enhancement +2
14. Add Graph Visualization support #1807
    :new chart type Impact:Medium enhancement +3
15. Support for Network Diagram charts #1740
    :new chart type enhancement +2
16. Callgraph chart feature request #1855
    :new chart type enhancement +2
17. Usage without moment-timezone? #2023
    :build :data enhancement +3
18. New Gantt-like chart #2203
    :new chart type enhancement +2