feat(plugin-electron): patch packaged executable with gpupatch

[Armaldio]

What

Adds a "Patch executable" checkbox to the Electron plugin. When enabled, the packaged Windows executable is patched with gpupatch, which injects NvOptimusEnablement and AmdPowerXpressRequestHighPerformance so the app always uses the discrete GPU on laptops.

How

• New patchExecutable boolean input surfaced as Windows-only via the platforms: ['win32'] chip (see ParamEditor.vue).
• src/shared/libs/plugin-electron/gpupatch.ts maps the host platform/arch to a gpupatch release asset, downloads the CLI once to <userData>/thirdparty/gpupatch, and patches the packaged exe in place (temp file + rename to avoid the CLI's interactive stdin wait).
• forge() runs the patch after a package build when enabled; non-win32 targets are skipped with a log message.
• Wired through package-v2.ts, defaults in utils.ts, DesktopApp.Electron type, and the c3toSteam preset.

Testing

• Unit tests for the asset-name mapping (gpupatch.spec.ts) — 24/24 tests pass.
• typecheck:node: no new errors (59 pre-existing, unrelated).
• ESLint clean on new files.

Notes

• Includes a changeset (minor) per repo convention.
• Runs on the host OS and patches the win32 target binary, so Windows builds can be patched from any supported host.