cli: add visualise command, sql only

[dirkdev98]

Supports visualising the known database structure into an ERD like schema

[github-actions]

==== C8 test coverage ====
Statements: 70.38% ( 18043/25635 )
Branches : 71.52% ( 2114 /2956 )
Functions : 70.75% ( 670 /947 )
Lines : 70.38% ( 18043 /25635 )

[github-actions]

==== Benchmark result ====

Node.js version: 14

Total benchmarks: 13
          Passed: 13
          Failed: 0
-----------
lbu validator simple                    5000000  iterations      470  ns/op
yup validator simple                      20000  iterations    58807  ns/op
fastest-validator validator simple     10000000  iterations      135  ns/op
lbu validator nested                      50000  iterations    47777  ns/op
yup validator nested                       5000  iterations   403611  ns/op
fastest-validator validator nested      2000000  iterations      837  ns/op
logger - strings                         500000  iterations     2397  ns/op
logger - objects                         500000  iterations     2813  ns/op
logger - deep objects                    500000  iterations     4374  ns/op
uuid                                    2000000  iterations      539  ns/op
uuid.isValid                           10000000  iterations      159  ns/op
isNil                                 500000000  iterations        0  ns/op
isPlainObject                         100000000  iterations       18  ns/op

[github-actions]

==== Benchmark result ====

Node.js version: 15

Total benchmarks: 13
          Passed: 13
          Failed: 0
-----------
lbu validator simple                    5000000  iterations      471  ns/op
yup validator simple                      20000  iterations    59852  ns/op
fastest-validator validator simple     10000000  iterations      139  ns/op
lbu validator nested                      50000  iterations    49860  ns/op
yup validator nested                       5000  iterations   426032  ns/op
fastest-validator validator nested      2000000  iterations      902  ns/op
logger - strings                         500000  iterations     2305  ns/op
logger - objects                         500000  iterations     3056  ns/op
logger - deep objects                    200000  iterations     5107  ns/op
uuid                                    2000000  iterations      614  ns/op
uuid.isValid                           10000000  iterations      170  ns/op
isNil                                 500000000  iterations        0  ns/op
isPlainObject                         100000000  iterations       19  ns/op

[tjonger]

@dirkdev98 More verbose message, when dot is not found. Including suggestion to install dot?