feature: update the implementation of CapitalizationRule to be more f…

…lexible

apollo-ios-codegen/Sources/ApolloCodegenLib/Capitalizer.swift

@@ -1,9 +1,19 @@
 import Foundation
 
-public enum CapitalizationRule: Codable, Equatable {
-  case uppercase(regex: String)
-  case lowercase(regex: String)
-  case titlecase(regex: String)
-  case camelcase(regex: String)
-  case pascalcase(regex: String)
+struct CapitalizationRule: Codable, Equatable {
+  enum Term: Codable, Equatable {
+    case string(String)
+    case regex(String)
+  }
+
+  enum Strategy: Codable, Equatable {
+    case uppercase
+    case lowercase
+    case titlecase
+    case camelcase
+    case pascalcase
+  }
+
+  let term: Term
+  let strategy: Strategy
 }