[Feature request] Installation as local user (without admin privileges)

Is there an existing issue for this?

• I have searched the existing issues

Description of the Issue

Currently, installation of Notepad++ requires access rights elevation (i.e. running as admin user) and sparks a UAC prompt. This requires that the admin first of all trusts the installer, but also prevents installation for users without admin rights. Running a portable version is not a good workaround, as it limits the capability of swift security updates and lacks explorer (right-click) integration.

There were some similar feature requests in the past, but I think it is time to revisit:
https://github.com/notepad-plus-plus/notepad-plus-plus/issues/388
https://github.com/notepad-plus-plus/notepad-plus-plus/issues/3425

I believe today the stance has changed so that app installations on a per-user level are a common thing. Especially since Microsoft Store with its app became more famous and moreover with the launch of Windows Package Manager (a.k.a. winget) and its success among users allowing a user install of Notepad++ is a valid request.

Describe the solution you'd like.

I am not exactly sure what options NSIS offers, but I can think of the following solutions:

1. commandline switch
2. spawn UAC prompt and fall back to per-user install if no elevated privileges are granted

Generally, per-user installs should go into %LocalAppData%\Notepad++

Debug Information

(none)

Anything else?

No response

The issue names NSIS and the intended %LocalAppData%\Notepad++ location, but no installer files or tests. Start by reviewing the existing installer configuration and the related issues 388 and 3425; done means a supported per-user installation without admin privileges, including the requested security-update and Explorer integration behavior.