[feat]: included a user-installer in releases/downloads

Problem

cannot install the app in without admin/elevation :(

Proposed solution

the title.

Alternatives considered

No response

Additional context

No response

Validations

• I have searched the existing issues and this feature has not been requested before.
• I have read the Contributing Guide and understand that new features require an approved issue before a PR is submitted.
• This request belongs to the Motrix Next desktop app, not the browser extension, download engine, or a usage question.