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* docs: ko: troubleshooting.mdx

* revised: fix _toctree.yml #23112

* feat: nmt draft `troubleshooting.mdx`

* fix: manual edits `troubleshooting.mdx`

* revised: resolve suggestions troubleshooting.mdx
Co-authored-by: Sohyun Sim <96299403+sim-so@users.noreply.github.com>

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Co-authored-by: Sohyun Sim <96299403+sim-so@users.noreply.github.com>