chore(guidelines): update ToC

DESIGN_GUIDELINES.md

@@ -1,65 +1,5 @@
 # AWS Construct Library Design Guidelines
 
-- [AWS Construct Library Design Guidelines](#aws-construct-library-design-guidelines)
-  - [What's Included](#what-s-included)
-  - [API Design](#api-design)
-    - [Modules](#modules)
-    - [Construct Class](#construct-class)
-    - [Construct Interface](#construct-interface)
-      - [Owned vs. Unowned Constructs](#owned-vs-unowned-constructs)
-      - [Abstract Base](#abstract-base)
-    - [Props](#props)
-      - [Types](#types)
-      - [Defaults](#defaults)
-      - [Flat](#flat)
-      - [Concise](#concise)
-      - [Naming](#naming)
-      - [Property Documentation](#property-documentation)
-      - [Enums](#enums)
-      - [Unions](#unions)
-    - [Attributes](#attributes)
-    - [Configuration](#configuration)
-      - [Prefer Additions](#prefer-additions)
-      - [Dropped Mutations](#dropped-mutations)
-    - [Factories](#factories)
-    - [Imports](#imports)
-      - [“from” Methods](#-from--methods)
-      - [From-attributes](#from-attributes)
-    - [Roles](#roles)
-    - [Resource Policies](#resource-policies)
-    - [VPC](#vpc)
-    - [Grants](#grants)
-    - [Metrics](#metrics)
-    - [Events](#events)
-    - [Connections](#connections)
-    - [Integrations](#integrations)
-    - [State](#state)
-    - [Physical Names - TODO](#physical-names---todo)
-    - [Tags](#tags)
-    - [Secrets](#secrets)
-  - [Project Structure](#project-structure)
-    - [Code Organization](#code-organization)
-  - [Implementation](#implementation)
-    - [General Principles](#general-principles)
-    - [Construct IDs](#construct-ids)
-    - [Errors](#errors)
-      - [Input Validation](#input-validation)
-      - [Avoid Errors If Possible](#avoid-errors-if-possible)
-      - [Never Catch Exceptions](#never-catch-exceptions)
-      - [Post Validation](#post-validation)
-      - [Attached Errors/Warnings](#attached-errors-warnings)
-    - [Tokens](#tokens)
-  - [Documentation](#documentation)
-    - [Inline Documentation](#inline-documentation)
-    - [Readme](#readme)
-  - [Testing](#testing)
-    - [Unit tests](#unit-tests)
-    - [Integration tests](#integration-tests)
-    - [Versioning](#versioning)
-  - [Naming & Style](#naming---style)
-    - [Naming Conventions](#naming-conventions)
-    - [Coding Style](#coding-style)
-
 The AWS Construct Library is a rich class library of CDK constructs which
 represent all resources offered by the AWS Cloud and higher-level constructs for
 achieving common tasks.
@@ -68,6 +8,68 @@ The purpose of this document is to provide guidelines for designing the APIs in
 the AWS Construct Library in order to ensure a consistent and integrated
 experience across the entire AWS surface area.
 
+* [Preface](#preface)
+* [What's Included](#what-s-included)
+* [API Design](#api-design)
+  * [Modules](#modules)
+  * [Construct Class](#construct-class)
+  * [Construct Interface](#construct-interface)
+    * [Owned vs. Unowned Constructs](#owned-vs-unowned-constructs)
+    * [Abstract Base](#abstract-base)
+  * [Props](#props)
+    * [Types](#types)
+    * [Defaults](#defaults)
+    * [Flat](#flat)
+    * [Concise](#concise)
+    * [Naming](#naming)
+    * [Property Documentation](#property-documentation)
+    * [Enums](#enums)
+    * [Unions](#unions)
+  * [Attributes](#attributes)
+  * [Configuration](#configuration)
+    * [Prefer Additions](#prefer-additions)
+    * [Dropped Mutations](#dropped-mutations)
+  * [Factories](#factories)
+  * [Imports](#imports)
+    * [“from” Methods](#-from--methods)
+    * [From-attributes](#from-attributes)
+  * [Roles](#roles)
+  * [Resource Policies](#resource-policies)
+  * [VPC](#vpc)
+  * [Grants](#grants)
+  * [Metrics](#metrics)
+  * [Events](#events)
+  * [Connections](#connections)
+  * [Integrations](#integrations)
+  * [State](#state)
+  * [Physical Names - TODO](#physical-names---todo)
+  * [Tags](#tags)
+  * [Secrets](#secrets)
+* [Project Structure](#project-structure)
+  * [Code Organization](#code-organization)
+* [Implementation](#implementation)
+  * [General Principles](#general-principles)
+  * [Construct IDs](#construct-ids)
+  * [Errors](#errors)
+    * [Avoid Errors If Possible](#avoid-errors-if-possible)
+    * [Error reporting mechanism](#error-reporting-mechanism)
+    * [Throwing exceptions](#throwing-exceptions)
+    * [Never Catch Exceptions](#never-catch-exceptions)
+    * [Attaching (lazy) Validators](#attaching--lazy--validators)
+    * [Attaching Errors/Warnings](#attaching-errors-warnings)
+    * [Error messages](#error-messages)
+  * [Tokens](#tokens)
+* [Documentation](#documentation)
+  * [Inline Documentation](#inline-documentation)
+  * [Readme](#readme)
+* [Testing](#testing)
+  * [Unit tests](#unit-tests)
+  * [Integration tests](#integration-tests)
+  * [Versioning](#versioning)
+* [Naming & Style](#naming---style)
+  * [Naming Conventions](#naming-conventions)
+  * [Coding Style](#coding-style)
+
 ## Preface
 
 As much as possible, the guidelines in this document are enforced using the