add some usable datasets(from different sources) in the learning path or other page

[wey-gu]

• basketballplayer
• ldbc (https://github.com/vesoft-inc/nebula-bench)
• livejournal (https://siwei.io/nebula-livejournal/#nebula-livejournal)
• Chinese(knowledge graph https://www.kaggle.com/littlewey/nebula-ownthink-property-graph ) https://github.com/jievince/rdf-converter
• corp relation shareholding: https://www.kaggle.com/littlewey/nebula-graph-shareolding-dataset https://github.com/wey-gu/nebula-shareholding-example
• dataset from https://nebula-graph.com.cn/demo/
• others(add link for others to contribute)

This is helpful for users to play with nebula easier and also enable collaboration in the community.

Is this good to go?

[whitewum]

basketballplayer is the default dataset for the doc.

LDBC is used for nebula-bench (for tests, and learn as well).

It is not necessary to add too many data sets to make users confused.

[wey-gu]

ping @QingZ11

[wey-gu]

more to go

• movie: https://www.siwei.io/nebulagraph-etl-dbt/ , https://github.com/wey-gu/movie-recommendation-dataset
• freebase: https://github.com/wey-gu/freebase-subset wip
• https://github.com/wey-gu/supplychain-dataset-gen, wip
• OpenStack https://github.com/wey-gu/openstack-graph
• K8s https://github.com/wey-gu/k8s-graph
• https://github.com/wey-gu/nebulagraph-yelp-frauddetection for gnn
• https://github.com/wey-gu/covid-track-graph-datagen
• https://github.com/wey-gu/fraud-detection-datagen (highly recommended )
• (see studio starter dataset) ...

[wey-gu]

• https://github.com/wey-gu/identity-correlation-datagen , wip