Introduce resolve-fallout4-path.bat to centralize locating the Fallout 4 installation. deploy-all.bat and deploy-ui.bat now call the resolver (accept an optional path arg or prompt interactively), and the chosen path is saved to a local .fallout4-path file (added to .gitignore). Updated docs (docs/dev-log.md, plugin/setup.md) to reflect the new behavior and usage examples. The resolver normalizes game or Data paths, probes common Steam locations, prompts the user when needed, and exports F4_DIR and DATA_DIR for callers.
Add Ultralight SDK as a git submodule (ThirdParty/Ultralight-SDK, Windows branch) and update build/deploy tooling and docs to use the vendored SDK by default. Updated .gitmodules and added the submodule pointer; build-prismaui.bat and deploy-all.bat now default UL_SDK to the submodule path and build-prismaui.bat checks the submodule is initialized. The PowerShell linker script (scripts/setup-ultralight-link.ps1) now falls back to ThirdParty/Ultralight-SDK when no SdkPath is provided. Documentation and developer log updated (docs/setup.md, plugin/setup.md, docs/dev-log.md) to document submodule initialization and usage; ULTRALIGHT_SDK_PATH can still override the default. Run 'git submodule update --init --recursive' on clones to initialize the SDK.
Andrew Zambazos