Added a Caddyfile converter (#110)

Co-authored-by: Julian Beittel <julian@beittel.net>
Co-authored-by: Glyn Normington <work@underlap.org>

README.md

@@ -14,6 +14,7 @@ This repository provides the following files:
 - `robots.txt`
 - `.htaccess`
 - `nginx-block-ai-bots.conf`
+- `Caddyfile`
 - `haproxy-block-ai-bots.txt`
 
 `robots.txt` implements the Robots Exclusion Protocol ([RFC 9309](https://www.rfc-editor.org/rfc/rfc9309.html)).
@@ -23,6 +24,8 @@ Note that, as stated in the [httpd documentation](https://httpd.apache.org/docs/
 
 `nginx-block-ai-bots.conf` implements a Nginx configuration snippet that can be included in any virtual host `server {}` block via the `include` directive.
 
+`Caddyfile` includes a Header Regex matcher group you can copy or import into your Caddyfile, the rejection can then be handled as followed `abort @aibots`
+
 `haproxy-block-ai-bots.txt` may be used to configure HAProxy to block AI bots. To implement it;
 1. Add the file to the config directory of HAProxy
 2. Add the following lines in the `frontend` section;