Collective.volto.enhancedlinks

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- Nothing changed yet.

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- Prevent write-on-read to each tool call.
[cekk]

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- Add tool to manage infos, removed memoize machinery
[mamico]

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- Add some default metadata in summary serializer.
[cekk]
- Return getObjSize and mime_type in summary serializer for brains and contents with enhancedlinks behavior.
[cekk]

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- Initial release.
[cekk]