0.1 Solution + projects

Scaffold FrameProcessor.slnx with src/FrameProcessor (net10.0 Web SDK) and
tests/FrameProcessor.Tests (xUnit) plus .gitignore and global.json pinning
the .NET 10 SDK. dotnet build, dotnet test, and dotnet format --verify-no-changes
all pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/FrameProcessor.Tests/UnitTest1.cs

@@ -0,0 +1,10 @@
+namespace FrameProcessor.Tests;
+
+public class UnitTest1
+{
+    [Fact]
+    public void Test1()
+    {
+
+    }
+}