Add DIS family conformance coverage through 0.8

[RejectKid]

What changed

• adds deterministic populated round-trip coverage for all 72 DIS v7 PDU types
• adds independent frozen wire vectors, including 70 compatible default vectors and 44 compatible populated vectors spanning all 12 protocol families
• rejects truncation at every byte boundary for every family
• corrects Live Entity's 10-byte header, variable-record lengths, offset-aware 64-bit padding, per-field enum/bitfield widths, and conditional IFF layers
• adds polymorphic Information Operations effect and communications-node records
• updates the README, standards baseline, changelog, and 0.3–0.8 conformance matrix

Design

OpenDisNet remains a native C#/.NET library. The NuGet package contains no Java code, Java dependency, runtime requirement, or Java-facing API. The Open-DIS Java project was used only offline to produce frozen interoperability test bytes.

Known defects in the reference generator are documented and retained as differential evidence instead of being reproduced in the C# codec.

Validation

• dotnet test OpenDisNet.slnx --configuration Release --no-restore — 302 passed
• protocol generator verification — 233 classes and 72 PDUs current
• dotnet pack src/OpenDisNet/OpenDisNet.csproj --configuration Release --no-restore — package and symbols package created for .NET 9 and .NET 10
• git diff main...HEAD --check — clean