[BUG] Can't find winget and pwsh (and possibly others) despite them being in the path

### Please confirm these before moving forward

- [x] I have searched for my issue and have not found a work-in-progress/duplicate/resolved issue.
- [x] I have tested that this issue has not been fixed in the latest [(beta or stable) release](https://github.com/marticliment/WingetUI/releases/).
- [x] I have checked the [FAQ](https://github.com/marticliment/WingetUI#frequently-asked-questions) section for solutions.
- [x] This issue is about a bug (if it is not, please use the [correct template](https://github.com/marticliment/WingetUI/issues/new/choose)).

### UniGetUI Version

3.3.5

### Windows version, edition, and architecture

Windows 11 Enterprise 23H2 x64

### Describe your issue

Unigetui reports at least winget and pwsh (7) as missing even though they work well in the shell, thus evidently are in the path mechanism somehow. This is especially annoying because the winget version shipped with unigetui doesn't work either.

Additionally I cannot manually set the path to any of these binaries.

It would probably sufficient to have the setting that is normally just a dropdown allow people to select the binary manually in that case.

### Steps to reproduce the issue

Just install and have a look at the package manager settings binary paths for winget and pwsh, winget is showing only the shipped and pwsh shows nothing in the dropdown.

### UniGetUI Log

```text
Not available
```

### Package Managers Logs

```text
not available
```

### Relevant information

_No response_

### Screenshots and videos

_No response_