Doc: list more tools for Cloudberry Database

[tuhaihe]

fix #ISSUE_Number

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Change logs

Now, more and more tools for Cloudberry Database are public in the GitHub. Add the new tools name to the README.md for a reference.

Why are the changes needed?

No test is needed.

Does this PR introduce any user-facing change?

No.

How was this patch tested?

Please detail how the changes were tested, including manual tests and any relevant unit or integration tests.

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