code-gen: sql follow references in DDL and where clause

[dirkdev98]

This allows to name types that are used as a table column.

Closes #309

[github-actions]

==== Benchmark result ====

Total benchmarks: 9
          Passed: 9
          Failed: 0
-----------
object validator simple      5000000  iterations     482  ns/op
object validator nested        50000  iterations   46776  ns/op
logger - strings              500000  iterations    3473  ns/op
logger - objects              500000  iterations    4101  ns/op
logger - deep objects         200000  iterations    6922  ns/op
uuid                         2000000  iterations     582  ns/op
uuid.isValid                10000000  iterations     143  ns/op
isNil                      500000000  iterations       0  ns/op
isPlainObject               50000000  iterations      21  ns/op

[github-actions]

==== C8 test coverage ====
Statements: 79.49% ( 15553/19567 )
Branches : 79.16% ( 1914 /2418 )
Functions : 76.03% ( 552 /726 )
Lines : 79.49% ( 15553 /19567 )