Merge branch 'main' of https://github.com/ControlPad/App

Rebrand app from ControlPad to Slidr (#5)

* Rebrand app from ControlPad to Slidr

Rename all user-facing strings, window titles, toast notifications,
registry keys, installer output, and AppData paths to Slidr.
C# namespaces and project file names remain as ControlPad.

* Fix repository URL in README

change: logo (#8)

feat: add requirements.json (#2)

feat: add requirements.json

Fix .NET 9.0 detection: use dotnet CLI and filesystem fallback instea…

…d of registry