refactor: move apps listing from common plugin to apps plugin

This helps centralize app-related listing fetching.

plugins/registry/go.mod

@@ -4,8 +4,11 @@ go 1.16
 
 require (
 	github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27
+	github.com/dokku/dokku/plugins/apps v0.0.0-00010101000000-000000000000
 	github.com/dokku/dokku/plugins/common v0.0.0-00010101000000-000000000000
 	github.com/spf13/pflag v1.0.5
 )
 
+replace github.com/dokku/dokku/plugins/apps => ../apps
+
 replace github.com/dokku/dokku/plugins/common => ../common

plugins/registry/subcommands.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"strings"
 
+	"github.com/dokku/dokku/plugins/apps"
 	"github.com/dokku/dokku/plugins/common"
 )
 
@@ -55,7 +56,7 @@ func CommandLogin(server string, username string, password string, passwordStdin
 // CommandReport displays a registry 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
 		}