Bevy Asset Store - showcases!

[mockersf]

I would like to propose as the next step for Bevy Assets https://bevyengine.org/assets/:

• eligible assets have an individual page that they can link to
  • to be eligible, assets must have a crates.io link
  • as a starting point, this is mostly the same page as the crates.io or lib.rs page for that crate
  • show the list of Bevy features it enables
  • add specific metadata to the Cargo.toml file, like a list of screenshots to display in a carousel
  • could show other things specific to Bevy, like list of components with direct links to docs.rs
• build a filtered automatic showcase of assets
  • must be published on crates.io
  • must depend on the last version of Bevy
  • must have a compatible license
  • must have screenshots
  • must respect the CoC
  • (maybe) must have more than one maintainer
  • (maybe) limited to the top X crates of a category based on recent download
  • crates can be excluded at the maintainers discretion

[janhohenheim]

must depend on the last version of Bevy

I'd change this to say "must depend on the latest or the previous version of Bevy" to account for the plugin migration period after a release. I know we have the RC workflow now, but plugin authors should not feel pressured to participate in order to not loose their showcase status.