feat: implement code generated handler framework

packages/@aws-cdk/handler-framework/.eslintrc.js

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+const baseConfig = require('@aws-cdk/cdk-build-tools/config/eslintrc');
+baseConfig.parserOptions.project = __dirname + '/tsconfig.json';
+module.exports = baseConfig;

packages/@aws-cdk/handler-framework/.gitignore

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+*.js
+*.js.map
+*.d.ts
+tsconfig.json
+node_modules
+*.generated.ts
+dist
+.jsii
+
+.LAST_BUILD
+.nyc_output
+coverage
+nyc.config.js
+.LAST_PACKAGE
+*.snk
+!.eslintrc.js
+!jest.config.js
+
+junit.xml

packages/@aws-cdk/handler-framework/.npmignore

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+# Don't include original .ts files when doing `npm pack`
+*.ts
+!*.d.ts
+coverage
+.nyc_output
+*.tgz
+
+dist
+.LAST_PACKAGE
+.LAST_BUILD
+!*.js
+
+# Include .jsii
+!.jsii
+
+*.snk
+
+*.tsbuildinfo
+
+tsconfig.json
+.eslintrc.js
+jest.config.js
+
+# exclude cdk artifacts
+**/cdk.out
+junit.xml
+test/
+!*.lit.ts
+**/*.snapshot

packages/@aws-cdk/handler-framework/LICENSE

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packages/@aws-cdk/handler-framework/NOTICE

@@ -0,0 +1,2 @@
+AWS Cloud Development Kit (AWS CDK)
+Copyright 2018-2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.

packages/@aws-cdk/handler-framework/jest.config.js

@@ -0,0 +1,18 @@
+const baseConfig = require('@aws-cdk/cdk-build-tools/config/jest.config');
+
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  ...baseConfig,
+
+  // Different than usual
+  testMatch: [
+    '<rootDir>/**/test/**/?(*.)+(test).ts',
+  ],
+
+  coverageThreshold: {
+    global: {
+      branches: 35,
+      statements: 55,
+    },
+  },
+};