fix nu_msvs (#1116)

nu_msvs doesn't work at all on my setup, vswhere return empty string
when called from nushell, the only way i made it to work is calling it
from powershell

on json parsing side
installationPath is not an array, and vswhere return an array of
installations is not correct

e.g
```json
[
  {
    "instanceId": "406fd398",
    "installDate": "2024-04-25T13:16:29Z",
    "installationName": "VisualStudioPreview/17.14.0-pre.5.0+36025.13",
    "installationPath": "C:\\Program Files (x86)\\Microsoft Visual Studio\\2022\\Preview",
    "installationVersion": "17.14.36025.13",
    "productId": "Microsoft.VisualStudio.Product.BuildTools",
    "productPath": "C:\\Program Files (x86)\\Microsoft Visual Studio\\2022\\Preview\\Common7\\Tools\\LaunchDevCmd.bat",
    "state": 4294967295,
    "isComplete": true,
    "isLaunchable": true,
    "isPrerelease": true,
    "isRebootRequired": false,
    "displayName": "Visual Studio Build Tools 2022",
    "description": "Visual Studio Build Tools vous permet de générer des applications MSBuild natives et managées sans passer par l'IDE Visual Studio. Il existe des options pour installer les compilateurs et bibliothèques Visual C++, ainsi que la prise en charge d'ATL, de MFC et de C++/CLI.",
    "channelId": "VisualStudio.17.Preview",
    "channelUri": "https://aka.ms/vs/17/pre/channel",
    "enginePath": "C:\\Program Files (x86)\\Microsoft Visual Studio\\Installer\\resources\\app\\ServiceHub\\Services\\Microsoft.VisualStudio.Setup.Service",
    "installedChannelId": "VisualStudio.17.Preview",
    "installedChannelUri": "https://aka.ms/vs/17/pre/channel",
    "releaseNotes": "https://go.microsoft.com/fwlink/?LinkId=661273#17.14.0-pre.5.0",
    "resolvedInstallationPath": "C:\\Program Files (x86)\\Microsoft Visual Studio\\2022\\Preview",
    "thirdPartyNotices": "https://go.microsoft.com/fwlink/?LinkId=661288",
    "updateDate": "2025-04-29T20:49:54.8401699Z",
    "catalog": {
      "buildBranch": "d17.14",
      "buildVersion": "17.14.36025.13",
      "id": "VisualStudioPreview/17.14.0-pre.5.0+36025.13",
      "localBuild": "build-lab",
      "manifestName": "VisualStudioPreview",
      "manifestType": "installer",
      "productDisplayVersion": "17.14.0 Preview 5.0",
      "productLine": "Dev17",
      "productLineVersion": "2022",
      "productMilestone": "Preview",
      "productMilestoneIsPreRelease": "True",
      "productName": "Visual Studio",
      "productPatchVersion": "0",
      "productPreReleaseMilestoneSuffix": "5.0",
      "productSemanticVersion": "17.14.0-pre.5.0+36025.13",
      "requiredEngineVersion": "3.14.2074.57458"
    },
    "properties": {
      "campaignId": "",
      "channelManifestId": "VisualStudio.17.Preview/17.14.0-pre.5.0+36025.13",
      "includeRecommended": "0",
      "nickname": "",
      "setupEngineFilePath": "C:\\Program Files (x86)\\Microsoft Visual Studio\\Installer\\setup.exe"
    }
  }
]
```

Author: Arthapz

modules/virtual_environments/nu_msvs/nu_msvs.nu

@@ -3,21 +3,18 @@ def --env find_msvs [] {
     $env.MSVS_BASE_PATH = $env.Path
     $env.PATH_VAR = (if "Path" in $env { "Path" } else { "PATH" })
 
-    # This is a total hack because nushell doesn't like parentheses in an environment variable like `$env.ProgramFiles(x86)`
-    let programfiles = $env | transpose name value | where name starts-with Program and name ends-with '(x86)' | get value.0
     # According to https://github.com/microsoft/vswhere/wiki/Installing, vswhere should always be in this location.
-    let vswhere_cmd = $'($programfiles)\Microsoft Visual Studio\Installer\vswhere.exe'
-
+    let vswhere_cmd = ($'($env."ProgramFiles(x86)")\Microsoft Visual Studio\Installer\vswhere.exe')
     let info = (
       if ($vswhere_cmd | path exists) {
-          (^$vswhere_cmd -format json | from json)
+          (^$vswhere_cmd -prerelease -products '*' -format json -nocolor -utf8 -sort | from json)
         } else {
           # this should really error out here
-          ('{"installationPath": [""]}' | from json)
+          ('[{"installationPath": ""}]' | from json)
         }
     )
 
-    $env.MSVS_ROOT = $info.installationPath.0
+    $env.MSVS_ROOT = $info.0.installationPath
 
     $env.MSVS_MSVC_ROOT = (
         if not ($'($env.MSVS_ROOT)\VC\Tools\MSVC\' | path exists) {