feat(cli): suporte i18n completo — 42 locales, --lang flag, config lang get/set/list (#2285)

feat(cli): suporte i18n completo — 42 locales, --lang flag, config lang get/set/list

- 42 locale files in bin/cli/locales/ (en + pt-BR fully translated, 29 with common/program, 11 scaffolds)
- --lang <code> global flag for per-execution override
- config lang get/set/list subcommands
- Locale persistence via ~/.omniroute/.env
- Path traversal protection via regex validation in normalize()
- Script generate-locales.mjs for scaffolding new locales
- Unit tests for lang commands + normalization security

Integrated into release/v3.8.0

bin/cli/program.mjs

@@ -31,6 +31,7 @@ export function createProgram() {
         t("program.context") || "Server context/profile to use for this command"
       ).env("OMNIROUTE_CONTEXT")
     )
+    .addOption(new Option("--lang <code>", t("program.lang")))
     .showHelpAfterError(true)
     .exitOverride();