v0.3.0

Type intelligence and API maturity. The headline is a cross-linked type
graph that surfaces RTTI data (members, offsets, sizes, layout,
inheritance, enum values, destructors) which 0.2.0 parsed internally but
never exposed on the facade.

Added

• types module + NimBinary::types() — the full Nim type graph
  recovered from V1 (TNimType) and V2 (TNimTypeV2) RTTI. Each
  NimType merges the RTTI symbol with parsed struct fields and resolves
  raw pointers into cross-references: member field types and parent
  (inheritance) types as TypeRef, and destructor / trace / finalizer /
  marker / deepcopy procs as CodeRef (demangled function + module). New
  public types: NimType, TypeField, EnumValue, TypeRef, CodeRef,
  TypeFlags, TypeShape. Accessors type_at(va), object_types(),
  enum_types(), and type_rva().
  • V2 inheritance chain decoded from the display class-token array
    (depth + 1 tokens, RESEARCH.md §3.2), with V2 parents linked through it.
  • V1 enum values (name, ordinal) recovered from the TNimNode
    slots, distinct from struct fields.
  • V2 → V1 field bridge: a non-nil typeInfoV1 backpointer is followed
    to import member names for ARC/ORC objects lacking nimTypeNames.
  • Non-file-backed RTTI globals (Mach-O __DATA,__common, §3.6) degrade to
    name-only entries (is_readable() == false) instead of being dropped.
• entrypoints module + NimBinary::code_entrypoints() — one
  deduplicated, VA-sorted stream of every labelled code address (entry shims,
  module inits, demangled procs, raise-enclosing functions, RTTI destructor /
  trace procs), tagged by EntrypointKind.
• NimBinary::nim_version() → NimVersionHint (Nim1xRefc / Nim2xArc
  / Nim2xOrc / Unknown), splitting ARC vs ORC by the presence of the ORC
  cycle collector (collectCycles). Heuristic; see rustdoc for limits
  (stripped ORC builds report as ARC).
• Ergonomics: Format::is_elf()/is_pe()/is_macho(); Arch::bits() and
  Arch::is_64bit(); NimBinary::bitness()/is_64bit();
  DetectionMatches::bits()/from_bits()/from_bits_truncate(); as_str() on
  every public discriminator enum (Format, Arch, GcMode, ShimKind,
  PathOs, NimKind, RttiVersion, plus the new TypeShape,
  EntrypointKind, NimVersionHint).
• Compile-time Send + Sync guarantee on NimBinary, plus a documented
  robustness contract (never panics, empty on missing, skip-per-record)
  and address-space contract in the crate docs.

Changed

• examples/dump.rs now prints the full type graph (members, offsets, enum
  values, inheritance, resolved destructors), the code-entrypoint kind
  histogram, and the Nim version hint.