feat: add python Permutation class to mimic hugging face dataset and provide pytorch dataloader (#2725)

docs/src/js/interfaces/SplitCalculatedOptions.md

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+[**@lancedb/lancedb**](../README.md) • **Docs**
+
+***
+
+[@lancedb/lancedb](../globals.md) / SplitCalculatedOptions
+
+# Interface: SplitCalculatedOptions
+
+## Properties
+
+### calculation
+
+```ts
+calculation: string;
+```
+
+***
+
+### splitNames?
+
+```ts
+optional splitNames: string[];
+```