Link to the configuration guide from the introduction

Author: st0012

README.md

@@ -19,6 +19,9 @@ This library provides debugging functionality to Ruby (MRI) 2.6 and later. It ha
   - Through the [`rdbg` executable](#the-rdbg-executable)
   - Through Ruby APIs
   - See [activate the debugger in your program](#activate-the-debugger-in-your-program) for details
+- Configurable:
+  - It provides many configurations and is configurable through the `~/.rdbgrc` file
+  - See the [configuration guide](/docs/configuration.md) for more information
 
 # Installation
 

misc/README.md.erb

@@ -19,6 +19,9 @@ This library provides debugging functionality to Ruby (MRI) 2.6 and later. It ha
   - Through the [`rdbg` executable](#the-rdbg-executable)
   - Through Ruby APIs
   - See [activate the debugger in your program](#activate-the-debugger-in-your-program) for details
+- Configurable:
+  - It provides many configurations and is configurable through the `~/.rdbgrc` file
+  - See the [configuration guide](/docs/configuration.md) for more information
 
 # Installation