Fix: prefix project data files with _ to exclude from Content pipeline

Statiq.Web's built-in Content pipeline uses the glob **/{!_,}*.md which
skips files starting with _. Renaming wopihost.md -> _wopihost.md and
updating the read pattern to projects/_*.md prevents the NRE. Reverts
the incorrect Program.cs ContentFiles override.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: petrsvihlik

Pipelines/ProjectsDataPipeline.cs

@@ -12,7 +12,7 @@ public ProjectsDataPipeline()
         {
             InputModules = new ModuleList
             {
-                new ReadFiles("projects/*.md"),
+                new ReadFiles("projects/_*.md"),
                 new ExtractFrontMatter(new ParseYaml()),
                 new RenderMarkdown().UseExtensions(),
                 new SetMetadata("ProjectModel", Config.FromDocument((doc, ctx) => new Project

Program.cs

@@ -12,7 +12,6 @@ await Bootstrapper
                 .CreateDefault(args)
                 .AddWeb()
                 .AddHostingCommands()
-                .AddSetting(WebKeys.ContentFiles, new[] { "**/{!_,}*.{html,cshtml,md}", "!projects/**" })
                 .RunAsync();
     }
 }