feat!: implement smithy-modeled endpoint resolution (#741)

Author: lucix-aws

.changes/634fc49b-751d-411c-b174-32e3035dbfba.json

@@ -0,0 +1,5 @@
+{
+    "id": "634fc49b-751d-411c-b174-32e3035dbfba",
+    "type": "feature",
+    "description": "**BREAKING** Implement codegen and update runtime for smithy-modeled endpoint resolution."
+}

.changes/e805b0f6-f80d-4353-b088-d073fd0363ca.json

@@ -0,0 +1,5 @@
+{
+    "id": "e805b0f6-f80d-4353-b088-d073fd0363ca",
+    "type": "feature",
+    "description": "Implement common-Kotlin URL parsing and IPv4/v6 address validation."
+}