[imCinq]

Move the Minecraft 26.3 NeoForge build from 26.3.0.45-beta to stable 26.3.0.86, with the same minimum supported loader version in the packaged metadata. Prepare it as unreleased v1.1.2 because v1.1.1 already shipped for Fabric 26.1.2. Existing release assets and other loader builds remain unchanged.

Update the changelog, README target status, and NeoForge guide with the candidate requirements, artifact hashes, validation, and remaining release gates.

Validation:

• Java 25 test build verifyArtifact --no-daemon --console=plain passed: 20 tests, no failures, errors, or skips.
• Repository privacy audit, client-only boundary audit, and whitespace checks passed.
• Stable patched-runtime bytecode retains the targeted fluid, particle, section compile, and translucent resort method signatures. This does not prove runtime mixin application.

Before publication, require this PR's packaged client/mixin audit and dedicated-server CI smoke, then playtest the exact runtime JAR for settings and water rendering with Sodium absent and present. No visual or performance result is claimed. Full local details are in docs/NEOFORGE_26_3.md.