…t, PSBaseTypeToStr

Hosts that embed a script debugger (watch windows, tooltips, REPL-style
inspection) all end up writing the same code: turn an arbitrary script
value into readable text and parse an edited value back. This adds the
helpers used by the TetzkatLipHoka fork's debugger frame:

- PSVariantToString(IFC, AppendType, NoQuotes): renders every base type
  including sets (element list), records (field list), static/dynamic
  arrays (element list, capped with '..' after 50 chars), variants
  (with their VarType), nested pointers and classes (via TStrings.Text
  or a published Caption/Title/Text/Lines/Strings property).
  AppendType prefixes the Delphi-style type name; NoQuotes returns
  string values raw instead of quoted.

- StringToPSVariant: the reverse direction for editable watches -
  parses text into ordinal/float/string/char/variant slots and into
  class instances via the same published properties. btPChar slots are
  deliberately not written: they hold raw pointers to memory the engine
  does not own.

- PSBaseTypeToStr(TPSBaseType/PIFTypeRec): base type names, optionally
  as Delphi names ('Integer' instead of 'S32'); the PIFTypeRec overload
  renders composed types (record field lists, array element types,
  class names).

- VarTypeToString: readable names for TVarType values.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>