feat(docs): quickstart guide for record encryption on Kubernetes (kroxylicious#2518)

* feat(docs): quickstart guide for record encryption on Kubernetes

Signed-off-by: Keith Wall <kwall@apache.org>

Author: k-wall

CHANGELOG.md

@@ -7,6 +7,7 @@ Format `<github issue/pr number>: <short description>`.
 
 ## SNAPSHOT
 
+* [#2402](https://github.com/kroxylicious/kroxylicious/issues/2402): feat(docs): Encryption-at-rest quickstart
 * [#2565](https://github.com/kroxylicious/kroxylicious/pull/2565): build(deps): bump io.javaoperatorsdk:operator-framework-bom from 5.0.4 to 5.1.2
 
 ## 0.14.0

docs/_assets/attributes.adoc

@@ -39,19 +39,24 @@
 // GitHub links
 :github: https://github.com/kroxylicious/kroxylicious
 :github-issues: {github}/issues
+:github-discussions: {github}/discussions
 // GitHub release links
 :github-release-base: {github}/releases
 :github-release: {github-release-base}/{KroxyliciousReleaseTag}
 :github-release-downloads: {github-release-base}/download/{KroxyliciousReleaseTag}
 :github-release-link: {github-release}[GitHub release page^]
 :AppAssetZipLink: {github-release-downloads}/{AppAssetZipFileName}
 :AppAssetTgzLink: {github-release-downloads}/{AppAssetTgzFileName}
+:OperatorAssetZipLink: {github-release-downloads}/{OperatorAssetZipFileName}
 
 // GitHub source links
 :github-source-tree-root: {github}/tree/{KroxyliciousGitRef}
 :github-blob-root: {github}/blob/{KroxyliciousGitRef}
 :github-raw-root: https://raw.githubusercontent.com/kroxylicious/kroxylicious/{KroxyliciousGitRef}
 
+// Slack
+:slack: link:https://kroxylicious.slack.com//[Slack]
+
 // Javadoc links
 :javadoc-base: https://javadoc.io/doc
 :api-javadoc: {javadoc-base}/io.kroxylicious/kroxylicious-api/{KroxyliciousVersion}