Javadoc field info v2

[peter-lawrey]

📝 Pull-request summary

*Aim: modernise and document the field-metadata layer (FieldInfo and friends)

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1. API & type housekeeping

Change	Details
Static import rationalisation	Added import static net.openhft.chronicle.wire.Wires.*; in FieldInfo.java to remove repetitive qualifiers. No behavioural impact.

2. Documentation lift

• FieldInfo interface

  • Full Javadoc rewrite: clearer contract, param/return docs for every method, examples of bracket semantics.
  • Detailed explanation of lookupClass reflection path.

• AbstractFieldInfo

  • Added field-level Javadoc, ctor explanations and hash/equals clarifications.

• Unsafe / reflection subclasses

  • VanillaFieldInfo, UnsafeFieldInfo and the primitive specialisations (IntFieldInfo, LongFieldInfo, CharFieldInfo, DoubleFieldInfo, ObjectFieldInfo) now all include:

    • purpose + behaviour summary
    • param docs for ctors
    • notes on error handling and equality semantics.