Toto manifest: re-bake 1B from refreshed weights; mark 2.0 multivariate=true

Toto 2.0 1B: re-bake from upstream weight refresh

Toto manifest: add 22m, 313m, 2.5b to 2.0 series

Toto 2.0 2.5B (f32 GGUF)

Toto 2.0 313M (f32 GGUF)

Toto 2.0 22M (f32 GGUF)

Toto manifest: add 2.0 versions block (4m, 1b)

Toto 2.0 1B (f32 GGUF)

Toto 2.0 4M (f32 GGUF)

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