Migrate command `ledgermetadata`

[zymap]

FEATURE REQUEST

1. Please describe the feature you are requesting.

• Using bkctl run ledgermetadata

2. Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have).
   Are you currently using any workarounds to address this issue?

• nice-to-have

3. Provide any additional detail on your proposed use case for this feature.

Usage:  bkctl ledger show [flags]

Flags:

    -d, --dumptofile
        Dump metadata for ledger, to a file

    -l, --ledgerid (*)
        Ledger ID

    -lf, --ledgeridformatter
        Set ledger id formatter

    -r, --restorefromefile
        Restore metadata for ledger, from a file


    -h, --help
        Display help information