Add pg_verifybackup documentation in English and Chinese

[guanLouise]

closes: #ISSUE_Number

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[github-actions]

Hiiii, @guanLouise welcome!🎊 Thanks for taking the effort to make our project better! 🙌 Keep making such awesome contributions!

[TomShawn]

Suggested change

	`pg_verifybackup` is a command-line tool used to verify the integrity and consistency of PostgreSQL database backups. It helps ensure that backup files are reliable when needed for data recovery.
	`pg_verifybackup` is a command-line tool used to verify the integrity and consistency of Apache Cloudberry database backups. It helps ensure that backup files are reliable when needed for data recovery.

[TomShawn]

Apache Cloudberry cannot be installed with package manager.