#125: Move code into sub-package db

[benedeki]

• moving code into db sub-package
• tests are not executed in parallel
• support classes moved to dedicated package/path

Closes #125

[github-actions[bot]]

JaCoCo model module code coverage report - scala 2.13.11

Overall Project	57.44%	:green_apple:

File	Coverage
StandardStatusHandling.scala	100%	:green_apple:
StatusAggregator.scala	100%	:green_apple:
ExplicitNamingRequired.scala	100%	:green_apple:
LettersCase.scala	100%	:green_apple:
NamingConvention.scala	100%	:green_apple:
package.scala	100%	:green_apple:
StatusException.scala	100%	:green_apple:
NamingException.scala	100%	:green_apple:
DBFunctionFabric.scala	97.59%	:green_apple:
DBSchema.scala	93.88%	:green_apple:
ByMajorityErrorsStatusAggregator.scala	92.11%	:green_apple:
SnakeCaseNaming.scala	89.29%	:green_apple:
ByFirstErrorStatusAggregator.scala	85.71%	:green_apple:
ByFirstRowStatusAggregator.scala	82.09%	:green_apple:
AsIsNaming.scala	72.22%	:green_apple:
DBEngine.scala	11.11%	:green_apple:
DBFunction.scala	4.01%	:green_apple:
UserDefinedStatusHandling.scala	0%	:green_apple:
Query.scala	0%	:green_apple:

[github-actions[bot]]

JaCoCo agent module code coverage report - scala 2.13.11

Overall Project	81.6%	:green_apple:

File	Coverage
StatusWithData.scala	100%	:green_apple:
DoobieEngine.scala	100%	:green_apple:
DoobieQuery.scala	100%	:green_apple:
DoobieFunction.scala	76.41%	:green_apple:

[github-actions[bot]]

JaCoCo slick module code coverage report - scala 2.13.11

Overall Project	87.73%	:green_apple:

File	Coverage
SlickPgEngine.scala	92.5%	:green_apple:
SlickFunction.scala	88.97%	:green_apple:
PgUUIDSupport.scala	87.34%	:green_apple:
SlickQuery.scala	84.87%	:green_apple: