Simplify the commands' usage description

[ahrtr]

Old output:

$ ./bbolt surgery meta update -h
Update fields in meta pages

Usage:
  bbolt surgery meta update <bbolt-file> [options] [flags]

Flags:
      --fields strings     comma separated list of fields (supported fields: pageSize, root, freelist and pgid) to be updated, and each item is a colon-separated key-value pair
  -h, --help               help for update
      --meta-page uint32   the meta page ID to operate on, valid values are 0 and 1
      --output string      path to the filePath db file

New output:

$ ./bbolt surgery meta update -h
Update fields in meta pages

Usage:
  bbolt surgery meta update <bbolt-file> [flags]

Flags:
      --fields strings     comma separated list of fields (supported fields: pageSize, root, freelist and pgid) to be updated, and each item is a colon-separated key-value pair
  -h, --help               help for update
      --meta-page uint32   the meta page ID to operate on, valid values are 0 and 1
      --output string      path to the filePath db file

[ahrtr]

cc @fuweid @tjungblu @ivanvc

[Elbehery]

LGTM

[ivanvc]

LGTM

[ahrtr]

cc @fuweid @tjungblu

[ahrtr]

I expect we can depend on @Elbehery @ivanvc @tjungblu @fuweid to review bbolt CMD changes.

and @fuweid and @tjungblu to review all bbolt changes.

[Elbehery]

Certainly .. i actually can start working in cobra migration for all cmds

[ahrtr]

Certainly .. i actually can start working in cobra migration for all cmds

Thanks, but please read #472 (comment)

[ivanvc]

Certainly .. i actually can start working in cobra migration for all cmds

Thanks, but please read #472 (comment)

I suggest to divide and conquer once we are able to migrate the commands

[fuweid]

LGTM