Add Javadoc to plain SQL DSL.field() constructors recommending to use code generation or at least pass a DataType

[lukaseder]

Users run into this kind of problem all the time:
#15257

The problem is caused by 2 things:

• Lack of code generation usage (https://blog.jooq.org/why-you-should-use-jooq-with-code-generation/)
• Lack of DataType information

We should recommend both improvements in the Javadoc of the relevant methods, to at least help users understand why some things don't work as well without a DataType attached to a Field<T>

[lukaseder]

Fixed in versions

• 3.19.0
• 3.18.5 (Add Javadoc to plain SQL DSL.field() constructors recommending to use code generation or at least pass a DataType - Merge [#15261] #15262)
• 3.17.14 (Add Javadoc to plain SQL DSL.field() constructors recommending to use code generation or at least pass a DataType - Merge [#15261] #15263)
• 3.16.20 (Add Javadoc to plain SQL DSL.field() constructors recommending to use code generation or at least pass a DataType - Merge [#15261] #15264)