glossary.sgmlの18.0対応です

[noborus]

抜けがあったglosstermの訳も追加してます。

[Copilot]

Pull Request Overview

This PR adds Japanese translations to several glossary terms in the PostgreSQL documentation. The changes improve accessibility for Japanese-speaking users by providing bilingual glossary entries and index terms.

• Adds Japanese translations to glossary terms (Asynchronous I/O, Input/Output, Merge, and TPS)
• Improves existing Japanese descriptions by replacing machine-translated text with more natural translations
• Adds Japanese index terms to enable better searchability in Japanese

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[Copilot]

[nitpick] The Japanese translation in brackets uses 'I/O' in Latin characters. For consistency with line 1515 where 'Input/Output' is translated as '入力/出力', consider using '非同期入力/出力' or adding furigana to clarify the reading of I/O.

Suggested change

	<glossterm>Asynchronous <acronym>I/O</acronym>【非同期<acronym>I/O</acronym>】</glossterm>
	<acronym>AIO</acronym>
	<indexterm>
	<primary>Asynchronous <acronym>I/O</acronym></primary>
	</indexterm>
	<indexterm>
	<primary>非同期<acronym>I/O</acronym></primary>
	<glossterm>Asynchronous <acronym>I/O</acronym>【非同期入力/出力】</glossterm>
	<acronym>AIO</acronym>
	<indexterm>
	<primary>Asynchronous <acronym>I/O</acronym></primary>
	</indexterm>
	<indexterm>
	<primary>非同期入力/出力</primary>

[Copilot]

[nitpick] The glossterm uses 'Input/Output' in English, but line 1515 shows the Japanese text uses 'Input/Output（入力/出力）' with parentheses. Consider using parentheses notation in the glossterm for consistency: 'Input/Output (入力/出力)' or using the bracket notation in the description as well.

Suggested change

	<glossterm>Input/Output【入力/出力】</glossterm>
	<glossterm>Input/Output（入力/出力）</glossterm>