feat(datasets): add Shopify product-catalogue VLM dataset (#3400)

* feat(datasets): add Shopify product-catalogue VLM dataset
Signed-off-by: zeryx <1892175+zeryx@users.noreply.github.com>

* added ShopifyProductCatalogueDatasetConfig to _DATASET_CONFIGS in loader.py

Signed-off-by: zeryx <1892175+zeryx@users.noreply.github.com>

* Missing return annotation for ShopifyProductCatalogueDatasetConfig.build, fixed

Signed-off-by: zeryx <1892175+zeryx@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* Update docs/guides/dataset-overview.mdx

Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>

* fix(recipes): complete Shopify CI metadata

Set the Shopify recipe owner and required single-node CI scheduling fields.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: HuiyingLi <willwin.lee@gmail.com>

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Signed-off-by: zeryx <1892175+zeryx@users.noreply.github.com>
Signed-off-by: HuiyingLi <willwin.lee@gmail.com>
Co-authored-by: Huiying <willwin.lee@gmail.com>
Co-authored-by: jgerh <163925524+jgerh@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>