[codex] Add Debug support for common types

[peter-jerry-ye]

Summary

• Add Debug support for common value types across uuid, stack, decimal, time, path, encoding, and json5.
• Use structural custom Debug representations for opaque/common value types so debug diffs preserve constructors, arrays, and labeled fields instead of plain formatted strings.
• Add blackbox debug_inspect coverage and regenerate pkg.generated.mbti interfaces.

Validation

• moon fmt
• moon check
• moon info
• moon test (546 passed)
• git diff --check

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 81d2496776

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Include offsets in Zone debug output

Because this Debug impl only uses the zone id, distinct zones can render identically: for example utc_zone and fixed_zone("UTC", 3600) both debug as Zone("UTC") even though fixed_zone accepts an arbitrary id and offset. That makes debug_inspect assertions unable to catch wrong fixed offsets or loaded TZ data when the id matches; include the offset data (and transitions for non-fixed zones) in the repr so the debug value reflects the actual zone being tested.

Useful? React with 👍 / 👎.