feat(yocto): add OpenNOW layer and reference images

[zortos293]

Adds meta-opennow for Yocto 6.0 Wrynose with Qt 6.11, glibc, and x86-64/AArch64 targets.

• Builds the Qt client from separately cross-compiled Rust runtime artifacts and a native license-report tool. The opt-in CMake import preserves sibling executable lookup and $ORIGIN library loading without invoking Cargo; existing desktop builds retain their normal path.
• Uses distribution FFmpeg/VAAPI and SDL3, checksum-pinned Cargo archives, and pinned SDL2 Git submodules. Cargo source replacement preserves both lockfiles and configure checks resolve them offline with --frozen. Intermediate staging preserves symbols for final package stripping/debug splitting.
• Includes pinned kas configurations, Weston reference images, integration/licensing/device guidance, a dependency-metadata generator, and CI for the CMake contract and both image dependency graphs. Reference images explicitly allow empty-password root login for development, not production use.

Validation performed:

• All 113 Qt build/packaging contract tests and 7 source-metadata tests passed. Workflow lint and kas bootstrap from a fresh build directory also passed. CMake tests configure, compile, install, relocate, and execute test-only ELF fixtures using the production build modules, and exercise cross-sysroot Wayland scanner paths.
• bitbake -g opennow-image passed through the actual kas configurations for qemux86-64 and qemuarm64.
• BitBake recipe QA, fetch, and unpack passed for all three application recipes, including the registry archives and SDL2 submodules.
• Both fetched workspaces resolved with cargo metadata --frozen and CARGO_NET_OFFLINE=true, using the recipe's SDL2 source-replacement function; neither lockfile changed.
• Generated metadata consistency and git diff --check passed.

A complete Yocto cross-build, image boot, and hardware/GFN streaming session have not been validated. This PR establishes the layer and its build contracts, not production certification for a board.

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[capy-ai]

Capy found 1 potential issue (1 high).

View 2 other findings in Capy.