Merge branch 'nagyv-release-cli-maintenance' into 'master'

Move the release-cli to maintenance mode

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/149993



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Hunter Stewart <hustewart@gitlab.com>
Approved-by: Timo Furrer <tfurrer@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Co-authored-by: Viktor Nagy (GitLab) <vnagy@gitlab.com>

doc/user/project/releases/release_cli.md

@@ -6,6 +6,13 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # GitLab Release CLI tool
 
+WARNING:
+**The `release-cli` is in maintenance mode**.
+The `release-cli` does not accept new features.
+All new feature development happens in the `glab` CLI,
+so you should use the [`glab` CLI](../../../editor_extensions/gitlab_cli/index.md) whenever possible.
+The `release-cli` is in maintenance mode, and [issue cli#7450](https://gitlab.com/gitlab-org/cli/-/issues/7450) proposes to deprecate it as the `glab` CLI matures.
+
 The [GitLab Release CLI (`release-cli`)](https://gitlab.com/gitlab-org/release-cli)
 is a command-line tool for managing releases from the command line or from a CI/CD pipeline.
 You can use the release CLI to create, update, modify, and delete releases.