docs: add rpk config list (#1259)

Author: paulohtb6

modules/ROOT/nav.adoc

@@ -275,6 +275,7 @@
 ***** xref:reference:rpk/rpk-cluster/rpk-cluster-config-force-reset.adoc[]
 ***** xref:reference:rpk/rpk-cluster/rpk-cluster-config-get.adoc[]
 ***** xref:reference:rpk/rpk-cluster/rpk-cluster-config-import.adoc[]
+***** xref:reference:rpk/rpk-cluster/rpk-cluster-config-list.adoc[]
 ***** xref:reference:rpk/rpk-cluster/rpk-cluster-config-lint.adoc[]
 ***** xref:reference:rpk/rpk-cluster/rpk-cluster-config-set.adoc[]
 ***** xref:reference:rpk/rpk-cluster/rpk-cluster-config-status.adoc[]

modules/reference/pages/rpk/rpk-cluster/rpk-cluster-config-list.adoc

@@ -0,0 +1,80 @@
+= rpk cluster config list
+// tag::single-source[]
+
+This command lists all available cluster configuration properties. Use the xref:reference:rpk/rpk-cluster/rpk-cluster-config-get.adoc[`rpk cluster config get`] command to retrieve specific property values, or xref:reference:rpk/rpk-cluster/rpk-cluster-config-edit.adoc[`rpk cluster config edit`] for interactive editing.
+
+Use the `--filter` flag with a regular expression to filter configuration keys. This is useful for exploring related configuration properties or finding specific settings.
+
+== Usage
+
+[,bash]
+----
+rpk cluster config list [flags]
+----
+
+== Examples
+
+List all cluster configuration properties:
+
+[,bash]
+----
+rpk cluster config list
+----
+
+List configuration properties matching a filter:
+
+[,bash]
+----
+rpk cluster config list --filter="kafka.*"
+----
+
+Filter properties containing "log":
+
+[,bash]
+----
+rpk cluster config list --filter=".*log.*"
+----
+
+Filter with case-insensitive matching:
+
+[,bash]
+----
+rpk cluster config list --filter="(?i)batch.*"
+----
+
+List configuration properties in JSON format:
+
+[,bash]
+----
+rpk cluster config list --format=json
+----
+
+List configuration properties in YAML format:
+
+[,bash]
+----
+rpk cluster config list --format=yaml
+----
+
+== Flags
+
+[cols="1m,1a,2a"]
+|===
+|*Value* |*Type* |*Description*
+
+|--filter |string |Filter configuration keys using regular expression.
+
+|--format |string |Output format. Possible values: `json`, `yaml`, `text`, `wide`, `help`. Default: `text`.
+
+|-h, --help |- |Help for list.
+
+|--config |string |Redpanda or `rpk` config file; default search paths are `/var/lib/redpanda/.config/rpk/rpk.yaml`, `$PWD/redpanda.yaml`, and `/etc/redpanda/redpanda.yaml`.
+
+|-X, --config-opt |stringArray |Override `rpk` configuration settings. See xref:reference:rpk/rpk-x-options.adoc[`rpk -X`] or execute `rpk -X help` for inline detail or `rpk -X list` for terser detail.
+
+|--profile |string |Profile to use. See xref:reference:rpk/rpk-profile.adoc[`rpk profile`] for more details.
+
+|-v, --verbose |- |Enable verbose logging.
+|===
+
+// end::single-source[]