Add wal2json package

[paraddise]

I need wal2json in my application, with default image cloudnative-pg/postgresql:16.2 I get folowwing error in my application

Original Error: *pgconn.PgError ERROR: could not access file "wal2json": No such file or directory (SQLSTATE 58P01)

[dosubot]

Hi, @paraddise. I'm Dosu, and I'm helping the postgres-containers team manage their backlog. I'm marking this issue as stale.

Issue Summary

• You requested the inclusion of the wal2json package in the cloudnative-pg/postgresql:16.2 image.
• Your application requires this package to function correctly, and currently encounters an error due to its absence.
• There have been no further comments or developments on this issue.

Next Steps

• Please let me know if this issue is still relevant to the latest version of the postgres-containers repository by commenting here.
• If there is no further activity, this issue will be automatically closed in 7 days.

Thank you for your understanding and contribution!

[paraddise]

Steel relevant, I'm waiting for PR review
#105

[dosubot]

@ sxd, the user @paraddise has indicated that the issue regarding the inclusion of the wal2json package is still relevant and they are waiting for a PR review (see #105). Could you please assist them with this?