Use something other than blockquotes for attention-grabbing callouts

[jberkus]

Currently, when we need to do a callout in a doc (e.g. "IMPORTANT WARNING: backup before starting") we use a blockquote. This has some limitations. First, it doesn't "pop" as much as an important warning should. There are also other issues like not being able to have two, separate, warnings in a row (see commentary for #977 ).

Surely docsy has a format element for callouts?

[ivanvc]

Maybe something like this could help?

{{% alert title="Important" color="warning" %}} Before starting work on converting the cluster to TLS, please make a backup of the etcd database. {{% /alert %}}

Ref: https://www.docsy.dev/docs/adding-content/shortcodes/#alert

[jberkus]

Yes, lemme try that out and if it works we'll open an issue to do a wholesale replace.