fix: make obfuscated modern-.NET output runnable + run every app in tests (#103)

[mcpolo99]

Fixes #103

Problem

Obfuscating a modern-.NET app (.NET 5+/10, e.g. a WinForms app) produced only the managed .dll in the output folder — no runnable .exe. On .NET Framework the obfuscated .exe is itself runnable, so this never surfaced there; on modern .NET the launcher is a native apphost and the app also needs its runtimeconfig.json / deps.json, none of which ConfuserEx copied. The reporter (a beginner) had a Confused/ folder that could not be launched at all.

Fix

ConfuserEngine.SaveModules now copies each modern-.NET module's runtime support files — <name>.runtimeconfig.json, <name>.deps.json and the apphost <name>.exe — next to the obfuscated module, so the output directory is directly runnable. It is a no-op on .NET Framework (those files don't exist).

Controlled by a new project option copyRuntimeFiles (default true, added to the .crproj schema). Set it to false to keep the previous "obfuscated modules only" output.

Why the test suite never caught this — and the coverage work

The cross-framework tests only executed .NET Framework .exe subjects; every net6/8/10 app was obfuscated but never launched, and only the rename protection was exercised cross-framework. A "compiles but crashes on startup" bug (exactly #103's class) was structurally invisible.

This PR closes that gap. Every runnable subject app is now actually executed after obfuscation:

• WinForms & WPF, net3.5 → net10: a new --selftest mode shows the real main window off-screen and invisible, pumps the message loop, then a thread-pool watchdog terminates cleanly (exit 42). A --selftest-crash variant throws once shown; the framework's unhandled-exception handlers catch it and report failure (non-42 exit, CRASH).
• Console, net6/8/10: run + crash-reporting via the unhandled-exception handler (net2.0–4.8 already execute via the rename tests).
• Shared, linked self-test hosts (Tests/Shared/*SelfTestHost.cs) keep this out of each of the ~15 subject apps.
• The UI tests run off-screen with no visible windows and need no interaction, so they run in local-ci on a developer machine (not just the paid GitHub runner).

Housekeeping

Restructured the cross-framework test projects into per-app-type subfolders — Tests/CrossFramework/{Console,WinForms,WPF,Library}/<Tfm>/ and Tests/CrossFramework/Test/ — via git mv (history preserved). Project/assembly names are unchanged; solution paths, project references and shared-file links were updated accordingly.

Verification

Full local CI green on the final tree: lint, full-solution build (incl. the C++/CLI project), 218 tests passed / 0 failed / 1 skipped (the skip is the UI-interactive FlaUI GUI test), and packaging. CrossFramework.Test alone is 55 passing, including all 24 UI self-run + 4 console self-tests. Confirmed the obfuscated net10 console/WinForms/WPF apps launch from the produced output folder.