docs: Deprecate ONNX legacy config and modernize Vision ML for INFERENCE

[javoweb-fc]

Description

This PR updates the developer reference documentation for the INFERENCE data event function to align with the latest on-device Vision ML runtime capabilities and contracts, while keeping underlying backend engines transparent to developers.

Key Changes

1. User-Friendly Abstraction: Removed direct references to underlying engine internals in user-facing text.
2. Strict File-Extension-Based Auto-Detection: Documented that model type auto-detection is determined strictly by the file extension (.tflite for Vision ML). Clarified that config-level parameters do not affect or override detection, but must still match the model type.
3. Streamlined Model Loading (Form Reference Files Only): Removed references to the central Model Catalog, catalog IDs, and resolution priority. Documentation now focuses exclusively on loading custom models via Form Reference Files.
4. ONNX Support Deprecation: Marked the legacy/ONNX-based configuration as Deprecated and added guidance to update to the newer config-based model definitions.
5. Execution Modes: Documented two paths: Vision ML and Legacy Vision ML (Deprecated).
6. Performance and Device Warnings: Added a prominent callout warning about computational overhead, device memory footprint, and battery drain.
7. Updated Examples: Updated the standard Vision ML example to use the modern config syntax.

JIRA / Issue Reference

Ref: FLCRM-20635

Notes

This is the first of two stacked PRs splitting the original #76. Part 2 (Generative LLM support) is stacked on top of this branch and targets it directly.

[Copilot]

Pull request overview

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Updates the INFERENCE data event documentation to reflect the modern on-device Vision ML runtime, deprecate the legacy ONNX-based mode, and clarify model loading/detection behavior for developers.

Changes:

• Reframes INFERENCE as on-device Vision ML with clearer execution modes and a prominent device resource warning.
• Documents strict file-extension-based model auto-detection and focuses model loading on form reference files.
• Deprecates the legacy ONNX path and refreshes the primary example to the modern config syntax.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 3 comments.

[HenryTabima]

LGTM

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 8 comments.