refactor: remove features beyond the UX plan

Drop additions that the UX plan does not ask for:

- the interactive label edit form; label edit now requires a flag
- label clone and the skip mode of label creation it needed
- repo rename rewriting the Git remote or tea.repository; it now
  warns that the remote still points to the old name
- the extra "source" remote on clones of pull mirrors
- run artifact download, which duplicates run download --zip
- 256-color and 24-bit label swatches; colors stay ANSI 16
- config list --show-source (config get keeps it)
- the membership and access GETs before team member/repo add and
  remove; Gitea's PUT and DELETE are idempotent

label edit/delete keep --by-name: it is the only way to address a
label whose name is a number that is also another label's ID.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/artifacts.go

@@ -25,10 +25,8 @@ import (
 func (a *application) artifactCommand() *cobra.Command {
 	group := &cobra.Command{
 		Use:   "artifact",
-		Short: "List and download the artifacts of runs",
-		Long: `List the artifacts that a run uploaded and download one as a ZIP archive.
-
-To download and extract the artifacts of a run by name, use tea run download.`,
+		Short: "List the artifacts of runs",
+		Long:  "List the artifacts that a run uploaded. To download them, use tea run download.",
 	}
 	var limit, page int
 	list := &cobra.Command{
@@ -55,55 +53,6 @@ $ tea run artifact list 34`,
 	list.ValidArgsFunction = a.completeRunArg()
 	group.AddCommand(list)
 
-	var destination downloadFlags
-	download := &cobra.Command{
-		Use:   "download <artifact-id>",
-		Short: "Download an artifact as a ZIP archive",
-		Long:  "Download an artifact as a ZIP archive without extracting it, named after the artifact by default.",
-		Example: `# download artifact 7 to <name>.zip
-$ tea run artifact download 7
-# write it to standard output
-$ tea run artifact download 7 --output - > build.zip`,
-		Annotations: textOutput("artifact downloads are binary"),
-		Args:        argsExact(1),
-		RunE: func(cmd *cobra.Command, args []string) error {
-			id, err := number(args[0])
-			if err != nil {
-				return err
-			}
-			t, err := a.resolve(cmd.Context(), true)
-			if err != nil {
-				return err
-			}
-			service := services.Actions{Client: t.client, Repository: t.Repo}
-			name := ""
-			if destination.output == "" || isDirectory(destination.output) {
-				artifact, err := service.Artifact(cmd.Context(), id)
-				if err != nil {
-					return err
-				}
-				name = artifact.Name + ".zip"
-			}
-			path, skip, err := destination.destination(name)
-			if err != nil || skip {
-				return err
-			}
-			body, err := service.DownloadArtifact(cmd.Context(), id)
-			if err != nil {
-				return err
-			}
-			defer body.Close()
-			if err := a.download(cmd, destination, path, body); err != nil {
-				return err
-			}
-			if path != "-" {
-				a.done(cmd, "Downloaded artifact %d to %s", id, path)
-			}
-			return nil
-		},
-	}
-	destination.register(download)
-	group.AddCommand(download)
 	return group
 }