dotnet-inspect: query and output system

The query system is like Go templates, without a DSL: inspection commands emit structured sections, with the broadest shared query surface on type, member, package, and library. project supports -D and -S but not general field/column projection. find supports -D discovery and field/column projection but not -S selection. Pairwise diff supports -D and -S but not field/column projection. diff --history supports section selection and projection but not -D discovery. workspace supports output formats, --count, and --rows, but not discovery, section selection, or field projection. depends supports -D, -S, categories, row windows, count, and field/column projection across its dependency graph and evidence sections. Several commands also expose a separate complete-service --envelope path described below. Other relationship commands may still expose fixed output. Discover the shape first where available, then select and project.