RIAutomobility: Unofficial Port

Datapack component update for Minecraft Java 26.2.

Added

• Added a synced riautomobility:frame_behavior dynamic registry for optional seat switching, integrated-engine rendering, and attachment rules.
• Added conservative defaults so unrelated third-party frames are unchanged unless their datapack explicitly opts into RIA behavior.
• Rebuilt ExamplePack around the current Automobility frame, wheel, recipe, and resource-model formats for Minecraft 26.x.

Changed

• RIA frame behavior is now resolved by component registry id instead of relying on model namespaces, allowing custom packs to use their own namespace safely.
• Updated project and Modrinth copy from Alpha to Beta and removed obsolete claims that lorry cargo and mounted seat switching were unavailable.

Fixed

• Corrected the ExamplePack buggy's frame orientation, wheel origin, wheelbase, seat placement, and integrated-engine presentation so its custom model renders as one coherent two-seat off-road vehicle.

Validation

• Added codec and resource-contract tests for the example frame, wheel, model, and synchronized RIA behavior definitions.
• Passed the complete automated test suite and a clean release build on both supported Minecraft branches.
• Loaded the ExamplePack on a dedicated 26.2 server and verified the custom buggy's model, wheel placement, resource reload, and integrated-engine rendering in a real connected client.