smartcontract/cli: improve tenant get output with table/JSON formatting

[juan-malbeclabs]

Summary of Changes

• Added --json flag to tenant get command for machine-readable output
• Replaced flat key-value output with formatted tables using tabled for human-readable display
• Tenant config and administrators are now shown as separate tables
• Administrators list is only shown when non-empty
• Expanded test coverage for all combinations of --json and admin presence

Diff Breakdown

Category	Files	Lines (+/-)	Net
Core logic	1	+148 / -14	+134

Single-file change adding structured output (table + JSON) to the tenant get CLI command.

Key files (click to expand)

• smartcontract/cli/src/tenant/get.rs — rewrote output logic to use tabled tables and serde_json for --json mode; added ConfigDisplay and AdminDisplay structs; expanded tests

Testing Verification

• Unit tests cover table output (with and without administrators) and JSON output (with and without administrators)
• All four combinations of --json flag × admin presence are exercised

[vihu]

Is the rename necessary if it's the same as the field (above as well), just wondering whether it would work as is without the #[tabled(rename=...)] (assuming field is the name we want to keep in the table)

[elitegreg]

This applies to those in ConfigDisplay too.

[juan-malbeclabs]

yes, changed.

[juan-malbeclabs]

In this other PR #3156 , I applied the same changes to the remaining commands to standardize both the human-readable output and the JSON output for integrations.

[elitegreg]

This applies to those in ConfigDisplay too.