modelVersion inference from sidecar file

[piotrekno1]

Summary

The SDK already infers modelId and quantization from the filename - modelVersion is the next step.

Options

• Read a companion .json sidecar next to the model file (common in MediaPipe/LiteRT bundles)
• Read from an asset manifest at a conventional path (assets/models/manifest.json)
• Expose WildEdge.modelVersionFrom(file): String? that checks for a sidecar and returns null on miss.

Notes

• Sidecar format to support: { "version": "1.2.0" } next to the model file
• Low priority; most apps don't ship sidecar manifests today