add missing interfaces to fix compilation

Author: Picazsoo

samples/server/petstore/kotlin-springboot-include-http-request-context-delegate/src/main/kotlin/com/some/pack/Fetchable.kt

@@ -0,0 +1,6 @@
+package com.some.pack
+
+interface Fetchable {
+
+    val likesFetch: Boolean
+}

samples/server/petstore/kotlin-springboot-include-http-request-context-delegate/src/main/kotlin/com/some/pack/Named.kt

@@ -0,0 +1,6 @@
+package com.some.pack
+
+interface Named {
+
+    val name: String
+}

samples/server/petstore/kotlin-springboot-include-http-request-context-delegate/src/main/kotlin/com/some/pack/WithCategory.kt

@@ -0,0 +1,6 @@
+package com.some.pack
+
+interface WithCategory {
+
+    val category: org.openapitools.model.Category?
+}

samples/server/petstore/kotlin-springboot-include-http-request-context-delegate/src/main/kotlin/com/some/pack/WithDefaultMethods.kt

@@ -0,0 +1,12 @@
+package com.some.pack
+
+interface WithDefaultMethods {
+
+    fun defaultMethodOne(): String {
+        return "defaultOne"
+    }
+
+    fun defaultMethodTwo(): Int {
+        return 2
+    }
+}