feat(home view): add icons to navigation pills

[anandaroop]

Note

Required by artsy/eigen#11528

https://artsyproduct.atlassian.net/browse/ONYX-1484

Adds an optional icon to the NavigationPill section type, which is used by the new QuickLinks section:

{
  homeView {
    section(id: "home-view-section-quick-links") {
      internalID
      __typename
      
      ... on HomeViewSectionNavigationPills {
        navigationPills {
          href
          ownerType
          title
          icon            # 👈🏽 👈🏽 new
        }
      }
    }
  }
}

{
  "data": {
    "homeView": {
      "section": {
        "internalID": "home-view-section-quick-links",
        "__typename": "HomeViewSectionNavigationPills",
        "navigationPills": [
          {
            "href": "/favorites",
            "ownerType": "follows",
            "title": "Follows",
            "icon": "FollowArtistIcon" // 👈🏽 👈🏽 icon name included in response, if it is defined
          },
          {
            "href": "/auctions",
            "ownerType": "auctions",
            "title": "Auctions",
            "icon": "AuctionIcon"
          },
          {
            "href": "/favorites/saves",
            "ownerType": "saves",
            "title": "Saves",
            "icon": "HeartIcon"
          },
          {
            "href": "/collect?price_range=%2A-1000",
            "ownerType": "collect",
            "title": "Art under $1000",
            "icon": null               // 👈🏽 👈🏽 else it is null
          },
          {
            "href": "/price-database",
            "ownerType": "priceDatabase",
            "title": "Price Database",
            "icon": null
          },
          {
            "href": "/news",
            "ownerType": "articles",
            "title": "Editorial",
            "icon": null
          }
        ]
      }
    }
  }

[anandaroop]

I debated typing this as an enum. But since the source of truth for which icons is supported is over in Eigen, there didn't seem to be any benefit in doing so, just an extra chore to keep the two repos synchronized.

[MounirDhahri]

Great! thanks

[dariakoko]

Thanks!