config: reference built-in filter scripts

Now that the share/filters folders are in $PATH when running the
commands, let's reference the scripts by their name.

Add more filter examples, some of them using the built-in filters, some
of them not...

Suggested-by: Teo Luppi <me@luppi.uk>
Suggested-by: Bence Ferdinandy <bence@ferdinandy.com>
Signed-off-by: Robin Jarry <robin@jarry.cc>
Acked-by: Moritz Poldrack <moritz@poldrack.dev>

config/aerc.conf

@@ -316,11 +316,17 @@ reply-to-self=true
 # You can also match on non-mimetypes, by prefixing with the header to match
 # against (non-case-sensitive) and a comma, e.g. subject,text will match a
 # subject which contains "text". Use header,~regex to match against a regex.
-#subject,~^\[PATCH=colordiff
-text/plain=sed 's/^>\+.*/\x1b[36m&\x1b[0m/'
-#text/html=pandoc -f html -t plain
-#text/html=w3m -dump -I UTF-8 -T text/html
+#
+text/plain=colorize
+text/calendar=calendar
+message/delivery-status=colorize
+message/rfc822=colorize
+#text/html=pandoc -f html -t plain | colorize
+#text/html=html | colorize
+#application/x-sh=bat -fP -l sh
 #image/*=catimg -w $(tput cols) -
+#subject,~Git(hub|lab)=lolcat -f
+#from,thatguywhodoesnothardwraphismessages=fmt -w 72 | colorize
 
 [openers]
 #