Add frozen Taskonomy training selections and official source references

Group leaf splits into I2T and I2I configs for dataset preview

Release 25 I2T and 7 I2I task splits

Add OmniTaskonomy data shards (17)

Add OmniTaskonomy data shards (16)

Add OmniTaskonomy data shards (15)

Add OmniTaskonomy data shards (14)

Add OmniTaskonomy data shards (13)

Add OmniTaskonomy data shards (12)

Add OmniTaskonomy data shards (11)

Add OmniTaskonomy data shards (10)

Add OmniTaskonomy data shards (9)

Add OmniTaskonomy data shards (8)

Add OmniTaskonomy data shards (7)

Add OmniTaskonomy data shards (6)

Add OmniTaskonomy data shards (5)

Add OmniTaskonomy data shards (4)

Add OmniTaskonomy data shards (3)

Add OmniTaskonomy data shards (2)

Add OmniTaskonomy data shards (1)

Document source dataset licenses and retain mixed licensing

Correct the license

Release 25 I2T and 0 I2I task splits

Update README.md

initial commit