Closes #124 - mention formatter settings repo

Author: PhilippSalvisberg

docs/7-tool-support/6-formatter-settings.md

@@ -0,0 +1,17 @@
+# PL/SQL & SQL Formatter Settings
+
+## Introduction
+[This GitHub repository](https://github.com/Trivadis/plsql-formatter-settings) provides formatter settings that follow the [Coding Style](../3-coding-style/coding-style.md) of these guidelines.
+
+Extensive settings using Arbori are provided for
+
+- Oracle SQLcl
+- Oracle SQL Developer
+
+Simple configuration files are also available for
+
+- Allround Automations PL/SQL Developer
+- JetBrains DataGrip
+- Quest Toad for Oracle
+
+There is also a [standalone formatter](https://github.com/Trivadis/plsql-formatter-settings/tree/main/standalone) that can be used in a [Git pre-commit Hook](https://github.com/Trivadis/plsql-formatter-settings/tree/main/hook) to automate the formatting process. By the way, the code blocks in these guidelines were formatted using this standalone formatter.