feat(01-03): add deterministic rich CLI output

- Inject bonfire.Output from stdin/stdout/stderr with stdlib widgets and x/term
- Degrade spinner, progress, table and prompts without a TTY or color
- Reject plugin command names that are not namespace:verb

internal/build/build.go

@@ -110,7 +110,10 @@ func generateMain(m Manifest) ([]byte, error) {
 	b.WriteString("\t\t\tcommands = append(commands, hasCommands.Commands()...)\n")
 	b.WriteString("\t\t}\n")
 	b.WriteString("\t}\n")
-	fmt.Fprintf(&b, "\troot := bonfire.NewRoot(%s, commands, out)\n", strconv.Quote(m.Binary))
+	fmt.Fprintf(&b, "\troot, err := bonfire.NewRoot(%s, commands, out)\n", strconv.Quote(m.Binary))
+	b.WriteString("\tif err != nil {\n")
+	b.WriteString("\t\treturn err\n")
+	b.WriteString("\t}\n")
 	b.WriteString("\troot.SetArgs(args)\n")
 	b.WriteString("\treturn root.Execute()\n")
 	b.WriteString("}\n")