adding support for always on mnemonics reg key

[sbatten]

fixes #54349

[bpasero]

@sbatten I do not understand why this code has to live in electron-main, you can use winreg also from the renderer directly, no? As such I think that is not an argument for having the menu bar service created if the custom menu is enabled.

Besides, if you are using a dependency to NPM, make sure to not require it via imports on top of the file, but rather to a dynamic import when you need it to delay loading of modules to the latest point possible. E.g. await import('winreg').then(...)

[sbatten]

@bpasero thanks for the advice. I also had trouble finding a place for this code to avoid layer breakage. Right now it is in the menubar service just for association reasons. Any recommendations are welcome. @Tyriar threw out having a registry service

[bpasero]

@sbatten I see the issue with the layer, so then I guess we need another IMenuService in workbench that lives in node or electron-browser to implement this. Or even more general, a service to access windows registry keys.