refactor: migrate from Candle to subprocess-based engine architecture

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ci: fix Vulkan SDK setup and CUDA version format

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ci: update actions to avoid actions/cache v2 deprecation

ci: use setup-vulkan-sdk action for robust Vulkan setup

ci: fix macOS find command in sd-binaries workflow

ci: fix vulkan-sdk installation on Linux for sd-binaries

ci: fix CUDA versions and update binary workflows

ci: add stable-diffusion.cpp binaries and update mistral.rs workflows

Update mistral-binaries.yml

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feat: Enhance chat functionality and update versioning

refactor: Update Mistral binaries workflow to use a dedicated source directory

feat: Add draft release publishing workflow for Mistral binaries

chore: Update asset suffixes in workflow files for macOS builds

refactor: Update function parameters for CUDA handling in system.rs

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fix: stabilize llama reasoning parser and narrow mistral artifacts