Add PickBestRid MSBuild task for RID negotiation (#50616)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: baronfel <[email protected]>
Co-authored-by: Chet Husk <[email protected]>
Co-authored-by: Copilot <[email protected]>

Author: 3 people

.github/copilot-instructions.md

@@ -2,6 +2,9 @@ Coding Style and Changes:
 - Code should match the style of the file it's in.
 - Changes should be minimal to resolve a problem in a clean way.
 - User-visible changes to behavior should be considered carefully before committing. They should always be flagged.
+- When generating code, run `dotnet format` to ensure uniform formatting.
+- Prefer using file-based namespaces for new code.
+- Do not allow unused `using` directives to be committed.
 
 Testing:
 - Large changes should always include test changes.

src/Tasks/Common/Resources/Strings.resx

@@ -995,4 +995,12 @@ You may need to build the project on another operating system or architecture, o
     <value>NETSDK1228: This project depends on the Aspire Workload which has been deprecated. Aspire now ships via NuGet packages and no longer requires a workload. Please visit {0} for upgrade guidance.</value>
     <comment>{StrBegins="NETSDK1228: "}</comment>
   </data>
+  <data name="RuntimeGraphFileDoesNotExist" xml:space="preserve">
+    <value>NETSDK1229: File '{0}' does not exist. Please ensure the runtime graph path exists.</value>
+    <comment>{StrBegins="NETSDK1229: "}{Locked="{0}"}</comment>
+  </data>
+  <data name="UnableToFindMatchingRid" xml:space="preserve">
+    <value>NETSDK1230: Unable to find a matching RID for '{0}' from among [{1}] in graph '{2}'.</value>
+    <comment>{StrBegins="NETSDK1230: "}{Locked="{0}"}{Locked="{1}"}{Locked="{2}"}</comment>
+  </data>
 </root>