Add declarations in public protocols as public declarations

Author: adellibovi

Sources/swift-api-inventory/Inventory.swift

@@ -2,8 +2,21 @@ import SwiftSemantics
 import SwiftDoc
 
 func inventory(of module: Module) -> [String] {
-    return module.symbols
+    let publicSymbols = module.symbols
         .filter { $0.declaration.isPublic }
+        
+    let publicNames = Set(publicSymbols
+        .map { $0.declaration.qualifiedName })
+        
+    let symbolsWithPublicContext = module.symbols
+        .filter { symbol -> Bool in
+            guard let context = symbol.declaration.context else { return false }
+            return publicNames.contains(context)
+    }
+    
+    let inventory = publicSymbols + symbolsWithPublicContext
+    
+    return inventory
         .sorted { $0.declaration.qualifiedName < $1.declaration.qualifiedName }
         .compactMap { representation(of: $0, in: module) }
 }