Port CrossUsage Windows support

[symonbaikov]

Summary

• port Windows runtime/package support from barramee27/crossusage while keeping OpenUsage branding
• split Rust into a workspace with openusage-core, openusage-cli, openusage-win-launcher, and src-tauri
• add Windows tray/window path, CLI sidecar, portable Windows packaging scripts, and manual/PR Windows GUI workflow
• add attribution for CrossUsage-derived Windows support
• fix Linux AppImage packaging by disabling linuxdeploy stripping for newer .relr.dyn system libraries

Verification

• bun install
• bun run bundle:plugins
• bun run test -- --run
• cargo fmt --all -- --check
• BINDGEN_EXTRA_CLANG_ARGS=-isystem/usr/lib/clang/21/include cargo check --workspace
• BINDGEN_EXTRA_CLANG_ARGS=-isystem/usr/lib/clang/21/include cargo test --workspace --locked
• OPENUSAGE_RESOURCES=src-tauri/resources target/release/openusage-cli list
• NO_STRIP=true APPIMAGE_EXTRACT_AND_RUN=1 BINDGEN_EXTRA_CLANG_ARGS=-isystem/usr/lib/clang/21/include bun tauri build --ci --no-sign --bundles deb,rpm,appimage --config {"bundle":{"createUpdaterArtifacts":false}}

Windows acceptance

• Windows GUI workflow runs on pull_request and workflow_dispatch
• Expected artifacts: NSIS installer, openusage.exe, openusage-cli.exe, WebView2Loader.dll when emitted, portable zip with resources