[SPI] Add SPIManifest for external docs link (#10804)

Added a Swift Package Index manifest file (https://swiftpackageindex.com/SwiftPackageIndex/SPIManifest/documentation) that specifies an external documentation link to the "Add Firebase to your Apple project" guide. This will result in the guide being linked from https://swiftpackageindex.com/firebase/firebase-ios-sdk.
firebase · Feb 9, 2023 · 6d1e7f5 · 6d1e7f5
1 parent ad66fee
commit 6d1e7f5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/.spi.yml b/.spi.yml
@@ -0,0 +1,3 @@
+version: 1
+external_links:
+  documentation: "https://firebase.google.com/docs/ios/setup"