Link previews per page added

[PhilippeduPreez]

closes #455

Link previews boolean added to frontmatter

Changes

• frontmatter value showLinkPreview will be used first if it exists instead of siteConfig value showLinkPreviews
• added change to docs at /docs/link-previews
• changed our home page and docs index page to not display link previews

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Latest commit: b04d7563c30938995da5a7f9857c6d4828bb0cad

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[rufuspollock]

@PhilippeduPreez why are we implementing this feature? This will add complexity to the app and it seems very specific need - what was the use case for this feature?

[olayway]

@PhilippeduPreez why are we implementing this feature? This will add complexity to the app and it seems very specific need - what was the use case for this feature?

@rufuspollock The use case is our home page, where we originally had links to features' doc pages under "Read more" and I don't think it looked good. Now we only have one wiki link on that page (and I still think it should go), so this could probably wait but tbh I'm glad we could have this option now, as I personally wouldn't like to see tooltip previews on my personal site's home page or on any index pages.

Not sure what is the complexity added here. We have options to enable/disable things per-page for anything else and it's 3 lines of code that has been changed. And it probably took 5 min of work.