Add license header automation

Author: nateprewitt

.github/workflows/check-license.yml

@@ -0,0 +1,20 @@
+name: License Header Check
+
+on:
+  pull_request:
+    branches:
+      - develop
+  push:
+    branches:
+      - develop
+
+jobs:
+  check-license-header: 
+    name: Check License Header
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: apache/skywalking-eyes/header@main
+        with:
+          mode: check 

.licenserc.yaml

@@ -0,0 +1,22 @@
+header:
+  license:
+    spdx-id: Apache-2.0
+    copyright-owner: Amazon.com, Inc. or its affiliates.
+    content: |
+      Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+      SPDX-License-Identifier: Apache-2.0 
+    
+  paths:
+    - '**/*.py'
+
+  paths-ignore:
+    - '**/*.md'
+    - '**/*.java'
+    - 'LICENSE'
+    - 'NOTICE'
+    - '**/smithy_core/rfc3986.py'
+
+  language:
+    Python:
+      extensions:
+        - ".py"