docs: replace invalid config get examples

[pranjalbhatia710]

Summary

• Replace stale hermes config get ... examples with valid hermes config show usage
• Update the remaining zh-Hans docs references so translated docs do not point users at a nonexistent subcommand

Fixes #30195

Test Plan

• hermes config --help
• hermes config show --help
• ! git grep -n "hermes config get" -- '*.md'
• git diff --check

[alt-glitch]

Duplicate of #30293 / #30349 — all replace the invalid hermes config get examples with hermes config show for #30195, touching the same zh-Hans doc files. #30293 is the earliest open one. Suggest consolidating.

[pranjalbhatia710]

Thanks, agreed. This overlaps the earlier config-doc fixes, so no need to keep another duplicate PR around if #30293 / #30349 is the path maintainers prefer. Fine to close this one for consolidation.

[pranjalbhatia710]

Closing this to reduce maintainer queue noise after the duplicate/consolidation note above. Thanks for pointing me to the earlier canonical PRs.