Add WireGuard monitor and docs

This commit adds a manifest for deploying a WireGuard prometheus
exporter, Role and RoleBinding for kube-prometheus to monitor the Kilo
namespace and a new guide in the docs about how to monitor Kilo.

Signed-off-by: leonnicolas <leonloechner@gmx.de>

Makefile

@@ -243,6 +243,7 @@ website/docs/README.md: README.md
 	cp -r docs/graphs website/static/img/
 	sed -i 's/\.\/docs\///g' $@
 	find $(@D)  -type f -name '*.md' | xargs -I{} sed -i 's/\.\/\(.\+\.svg\)/\/img\/\1/g' {}
+	find $(@D)  -type f -name '*.md' | xargs -I{} sed -i 's/\.\/\(.\+\.png\)/\/img\/\1/g' {}
 	sed -i 's/graphs\//\/img\/graphs\//g' $@
 	# The next line is a workaround until mdx, docusaurus' markdown parser, can parse links with preceding brackets.
 	sed -i  's/\[\]\(\[.*\](.*)\)/\[\]\1/g' website/docs/api.md