* Adds a basic @astrojs/prefetch integration
* adding tests for custom selectors
* missed in last commit
* Adding a few docs, removing the option for `selectors` to be an element array
* adding an option for the concurrency limit
* fixing test for updated integration options
* Update packages/labs/prefetch/src/client.ts
Co-authored-by: Nate Moore <natemoo-re@users.noreply.github.com>
* nit: removing the NodeJS.Timer type to allow typescript to infer the return
* updating docs for default selector with ~=
* Skip prefetching on 2G connections, or when data saver is enabled
* refactor: moving to packages/integrations, Astro Labs TBD down the road
* README typo fix
Co-authored-by: Nate Moore <natemoo-re@users.noreply.github.com>
