feat: accept ls and rm for list and delete commands

Every list command also answers to ls and every delete command to rm,
as in gh. flagAliases lets a command accept old flag names for renamed
flags without listing them in help, so singular gh names such as
--add-label can become primary while the plural names keep working.

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

internal/app/app.go

@@ -26,6 +26,7 @@ import (
 	"gitea.dev/tea/internal/transport"
 	"gitea.dev/tea/internal/version"
 	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
 )
 
 // Dependencies supplies external boundaries for a fresh CLI invocation.
@@ -149,9 +150,37 @@ func NewRoot(deps Dependencies) *cobra.Command {
 	root.InitDefaultCompletionCmd()
 	root.SetVersionTemplate("{{.Version}}\n")
 	rejectUnknownSubcommands(root)
+	addVerbAliases(root)
 	return root
 }
 
+// verbAliases are the gh-style short names that every command with a common verb accepts (D6).
+// Commands add other gh verbs, such as new, co, add and get, to their own Aliases.
+var verbAliases = map[string]string{"list": "ls", "delete": "rm"}
+
+// addVerbAliases gives every list and delete command its short name.
+func addVerbAliases(cmd *cobra.Command) {
+	if alias, ok := verbAliases[cmd.Name()]; ok && cmd.HasParent() && !slices.Contains(cmd.Aliases, alias) {
+		cmd.Aliases = append(cmd.Aliases, alias)
+	}
+	for _, child := range cmd.Commands() {
+		addVerbAliases(child)
+	}
+}
+
+// flagAliases makes the flags of cmd accept each key of aliases as another name of the flag it maps
+// to, without showing it in help. Renamed flags keep their old names working this way, such as the
+// plural --add-labels after the singular gh name --add-label became primary (D8).
+func flagAliases(cmd *cobra.Command, aliases map[string]string) {
+	normalize := cmd.Flags().GetNormalizeFunc()
+	cmd.Flags().SetNormalizeFunc(func(flags *pflag.FlagSet, name string) pflag.NormalizedName {
+		if to, ok := aliases[name]; ok {
+			name = to
+		}
+		return normalize(flags, name)
+	})
+}
+
 // checkOutputFlags validates --json and --jq before a command runs. --jq alone selects every field,
 // except on commands that filter their raw JSON themselves (annotation tea.rawjson).
 func (a *application) checkOutputFlags(cmd *cobra.Command) error {