refactor: move apps listing from common plugin to apps plugin

This helps centralize app-related listing fetching.

plugins/proxy/subcommands.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"strings"
 
+	"github.com/dokku/dokku/plugins/apps"
 	"github.com/dokku/dokku/plugins/common"
 	"github.com/dokku/dokku/plugins/config"
 )
@@ -152,7 +153,7 @@ func CommandPortsSet(appName string, portMaps []string) error {
 // CommandReport displays a proxy report for one or more apps
 func CommandReport(appName string, format string, infoFlag string) error {
 	if len(appName) == 0 {
-		apps, err := common.DokkuApps()
+		apps, err := apps.DokkuApps()
 		if err != nil {
 			return err
 		}