Run SortResX with pwsh on non-Windows hosts

The SortResX target only set its command on Windows (powershell), so the
resx-sorting build step was a silent no-op on Linux/macOS even though
pwsh (PowerShell 7+) is available there -- mirror the PowerShell cmdlet
project's powershell/pwsh split. The included Resources.resx change is
that step catching up one entry (ExportProjectSolution) that had drifted
out of order while the target was disabled. The script is EOL-preserving,
so this stays LF with no cross-OS churn.

Assisted-by: Claude:claude-opus-4-8:Claude Code

ILSpy/ILSpy.csproj

@@ -193,6 +193,9 @@
     <PropertyGroup Condition=" '$(OS)' == 'Windows_NT' ">
       <SortResX>powershell -NoProfile -ExecutionPolicy Bypass -File BuildTools/sort-resx.ps1</SortResX>
     </PropertyGroup>
+    <PropertyGroup Condition=" '$(OS)' != 'Windows_NT' ">
+      <SortResX>pwsh -NoProfile -ExecutionPolicy Bypass -File BuildTools/sort-resx.ps1</SortResX>
+    </PropertyGroup>
     <Exec WorkingDirectory=".." Command="$(SortResX)" Timeout="60000" Condition="'$(SortResX)' != ''" />
     <Touch Files="@(SortResXStamp)" AlwaysCreate="true" Condition="'$(SortResX)' != ''" />
   </Target>

ILSpy/Properties/Resources.resx

@@ -660,6 +660,9 @@ Are you sure you want to continue?</value>
   <data name="ExpandUsingDeclarationsAfterDecompilation" xml:space="preserve">
     <value>Expand using declarations after decompilation</value>
   </data>
+  <data name="ExportProjectSolution" xml:space="preserve">
+    <value>Export Project/Solution...</value>
+  </data>
   <data name="ExtractAllPackageEntries" xml:space="preserve">
     <value>Extract all package entries</value>
   </data>
@@ -675,9 +678,6 @@ Are you sure you want to continue?</value>
   <data name="Forward" xml:space="preserve">
     <value>Forward</value>
   </data>
-  <data name="ExportProjectSolution" xml:space="preserve">
-    <value>Export Project/Solution...</value>
-  </data>
   <data name="GeneratePortable" xml:space="preserve">
     <value>Generate portable PDB</value>
   </data>