Split plugin commands into individual files

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

cmd/flux/plugin_search.go

@@ -0,0 +1,81 @@
+/*
+Copyright 2026 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	"github.com/fluxcd/flux2/v2/internal/plugin"
+	"github.com/fluxcd/flux2/v2/pkg/printers"
+)
+
+var pluginSearchCmd = &cobra.Command{
+	Use:   "search [query]",
+	Short: "Search the plugin catalog",
+	Long:  `The plugin search command lists available plugins from the Flux plugin catalog.`,
+	Args:  cobra.MaximumNArgs(1),
+	RunE:  pluginSearchCmdRun,
+}
+
+func init() {
+	pluginCmd.AddCommand(pluginSearchCmd)
+}
+
+func pluginSearchCmdRun(cmd *cobra.Command, args []string) error {
+	catalogClient := newCatalogClient()
+	catalog, err := catalogClient.FetchCatalog()
+	if err != nil {
+		return err
+	}
+
+	var query string
+	if len(args) == 1 {
+		query = strings.ToLower(args[0])
+	}
+
+	pluginDir := pluginHandler.PluginDir()
+	header := []string{"NAME", "DESCRIPTION", "INSTALLED"}
+	var rows [][]string
+	for _, entry := range catalog.Plugins {
+		if query != "" {
+			if !strings.Contains(strings.ToLower(entry.Name), query) &&
+				!strings.Contains(strings.ToLower(entry.Description), query) {
+				continue
+			}
+		}
+
+		installed := ""
+		if receipt := plugin.ReadReceipt(pluginDir, entry.Name); receipt != nil {
+			installed = receipt.Version
+		}
+
+		rows = append(rows, []string{entry.Name, entry.Description, installed})
+	}
+
+	if len(rows) == 0 {
+		if query != "" {
+			cmd.Printf("No plugins matching %q found in catalog\n", query)
+		} else {
+			cmd.Println("No plugins found in catalog")
+		}
+		return nil
+	}
+
+	return printers.TablePrinter(header).Print(cmd.OutOrStdout(), rows)
+}