Adding task guides to resources (#21704)
* added resources: links to task guides that support these models
* minor polishing
* conflict resolved
* link fix
* Update docs/source/en/model_doc/vision-encoder-decoder.mdx
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
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Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
