Remove Scriban: Pure C# Rendering + NativeAOT Hardening

This release replaces the Scriban template engine with pure C# rendering internally. There are
no user-visible output changes — reports look exactly the same as before. The notable effects
are: zero third-party NuGet package dependencies, a smaller NativeAOT binary, and several
AzApi rendering fidelity improvements that came out of the migration.

✨ Features

• Zero third-party runtime dependencies. Scriban was the only third-party NuGet package
  in tfplan2md. It has been replaced entirely with pure C# rendering classes. The binary now
  has no external library dependencies at all.

• Full reflection-free NativeAOT binary. A new Roslyn source generator (JsonEmbedGenerator)
  embeds role definitions, AzApi documentation mappings, and icon rules as Brotli-compressed
  compile-time constants (IlcDisableReflection=true is now enabled). This improves trim
  safety and reduces the risk of NativeAOT publish surprises.

• Smaller NativeAOT binary. Removed the Scriban and System.Xml.Linq assembly references,
  reducing the published image size.

🐛 Bug fixes

• AzApi resource rendering fidelity. The migration from Scriban templates to C# renderers
  exposed several gaps in AzApi output:

  • Restored per-resource Type, API documentation link, Body, and Output Values sections
  • Fixed grouped body section rendering and sensitive-path masking for azapi_resource and
    azapi_update_resource
  • Fixed sensitive empty-container placeholders (e.g., accessPolicies) — rows were
    previously omitted
  • Fixed array table rendering: nested arrays (e.g., siteConfig.appSettings) now render as
    index-row matrices instead of per-item mini-tables
  • Fixed AzApi numeric value preservation (12.0 is no longer normalized to 12)
  • Fixed output-values ordering for grouped/sensitive output snapshots

• Smaller Docker build context. Added .dockerignore to exclude docs, test results, and
  generated artifacts from the build context, reducing it from ~3.39 GB to ~78 KB.

🔗 Commits

• 6f517161 refactor: remove Scriban and migrate to pure C# rendering
• 424753ab feat: implement azapi-specific C# rendering pipeline for fix #1
• eb1ac573 fix: finalize azapi output values snapshot parity
• 7864eb88 fix: implement snapshot parity fixes 12, 4, and 5
• 9df5978c fix: implement snapshot parity fixes 11 6 7 8
• 2a285718 feat: finalize reflection-free embedded json generator integration
• 724271ea fix: drop System.Xml.Linq to reduce NativeAOT size
• d8cc7d68 chore: add .dockerignore to exclude unnecessary files from image build context