Generate and preserve json output on package publication

[mario4tier]

When doing "localnet publish" following would be useful:

• the "lsui move publish" always have the --json option set.
• Save the output under published-data with a fix name (so SDK or user can retrieve it).
• Have that Json data readable through the Rust SuiBase Helper.

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Note: Since the normal output is disabled with --json, the package-id.json will need to be identified from parsing that json output.

[mario4tier]

Two files now always generated on success:

publish-output.json <- Complete JSON output from the sui move publish command package-id.json <- Only the published package id hex value, because sometimes that is all you need...

[mario4tier]

Fixed with commit 1feffd1943a32c3d057273788a4811eaee6c7aae