chore(i18n): wrap @stacksjs/ts-i18n for loader/codegen + remove standalone httx package

- @stacksjs/i18n now depends on @stacksjs/ts-i18n and re-exports its
  loader, type generator, and sample-config helper. Adds a
  loadFromTsI18n() entry that delegates disk loading to the library
  and registers the result with the global Stacks translator.

- The standalone storage/framework/core/httx package was a duplicate
  of the published @stacksjs/httx CLI/library. Removed in favor of
  the canonical @stacksjs/httx (now at 0.1.8 in the lib repo,
  pending npm publish + token refresh).

- buddy bumps @stacksjs/httx to ^0.1.8 to pull in the new circuit
  breaker + verb-method conveniences once the publish lands.

Author: chrisbbreuer