Add option to explore the snapshot

[tzi]

For example:

• a status command

$ bemlinter status
There is currently 2 errors on 2 blocks.
 - root: 1 errors on 1 blocks
 - module:  1 errors on 1 blocks

• a status command for a module

$ bemlinter status --module root
There is currently 1 errors on 1 blocks for the root module.

• a error listing command

$ bemlinter list
There is currently 2 errors on 2 blocks.
  ✗ unprefixed
[unprefixed.scss:8] Error: \".c-prefixed\" is incoherent with the file name, \".unprefixed\" expected.
  ✗ module / prefixed
[module-prefixed.scss:1] Error: \".c-prefixed\" is incoherent with the file name, \".prefixed\" expected.

• a error listing command for a module

$ bemlinter list --module root
There is currently 1 errors on 1 blocks for the root module.
  ✗ unprefixed
[unprefixed.scss:8] Error: \".c-prefixed\" is incoherent with the file name, \".unprefixed\" expected.