V2: WASI, -r flag, CI pipeline, examples & tests cleanup

WASI / wasm32 target support
- Auto-detect /usr/share/wasi-sysroot on Linux when target starts_with("wasm32")
- Skip -march/-mtune for wasm (clang rejects them)
- Apply -fno-exceptions -fno-c++-static-destructors -mllvm -wasm-enable-sjlj
  -D_WASI_EMULATED_SIGNAL to wasm builds (compile + std PCM, kept in sync)
- .wasm output extension in expectedOutputFor and link command
- EnableWasiBrowserRuntime(cfg): opt-in helper that drops index.html +
  runtime.js next to the .wasm; runtime.js reads window.CRAFTER_WASM_URL
  set in the templated index.html so a single shim handles any output name

-r run flag in the CLI: build then exec the artifact (host targets only;
  rejects libraries; auto .exe/.wasm extension handling)

CI pipeline (.forgejo/workflows/ci.yaml)
- Triggers: PR/push to master + manual dispatch
- Single arch-latest container job: install deps, bootstrap, self-rebuild,
  run tests, cross-compile mingw, package both archives, upload artifacts
- Rolling 'latest' release published only on push/dispatch to master

mingw cross-compile from Linux now works end-to-end:
- ExternalDependency cache key includes target so per-target glslang builds
  don't collide; CMAKE_BUILD_TYPE=Release pinned (otherwise glslang appends
  'd' to lib names and breaks linking); cross-compile cmake flags
  (CMAKE_SYSTEM_NAME=Windows, CMAKE_*_COMPILER_TARGET=...)
- project.cpp accepts --target=<triple>; Linux-only -Wl,--export-dynamic
  and -ldl are gated; mingw glslang skips the standalone exe (its libgcc_eh
  link pulls pthread which mingw doesn't link by default)
- mingw compile uses -femulated-tls so std::__once_callable etc reference
  the same emutls symbols libstdc++ provides
- mingw link auto-adds -lstdc++exp -lpthread

GetCrafterBuildHome() exposed from the Platform module; LoadProject (Linux
+ Windows) now both use it instead of duplicating the resolution.

Examples reorg: hello-world, library, with-module, wasi, tests — each with
its own README. Tests reorg: per-test directory with inner/ fixture, no
shared tests/fixtures/ tree. New Wasi test verifies .wasm magic bytes.

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

tests/RunnerClassification/RunnerClassification.cpp

@@ -0,0 +1,37 @@
+/*
+Crafter® Build
+Copyright (C) 2026 Catcrafts®
+Catcrafts.net
+
+LGPL-3.0-only.
+*/
+
+import std;
+import Crafter.Build;
+#include "../_shared/TestUtil.h"
+namespace fs = std::filesystem;
+using namespace TestUtil;
+using namespace Crafter;
+
+int main() {
+    try {
+        fs::path src = fs::current_path() / "tests" / "RunnerClassification" / "inner";
+        Configuration cfg = LoadFixture("RunnerClassification", src);
+
+        RunTestsOptions opts;
+        opts.timeoutOverride = std::chrono::seconds(2);  // Hang test bounded
+        TestSummary summary = RunTests(cfg, opts);
+
+        if (summary.passed != 1 || summary.failed != 1 ||
+            summary.crashed != 1 || summary.timedOut != 1 || summary.skipped != 0) {
+            std::println(std::cerr,
+                "outcome counts mismatch: passed={} failed={} crashed={} timedOut={} skipped={}",
+                summary.passed, summary.failed, summary.crashed, summary.timedOut, summary.skipped);
+            return 1;
+        }
+        return 0;
+    } catch (const std::exception& e) {
+        std::println(std::cerr, "test exception: {}", e.what());
+        return 1;
+    }
+}

tests/RunnerClassification/inner/project.cpp

@@ -0,0 +1,33 @@
+import std;
+import Crafter.Build;
+namespace fs = std::filesystem;
+using namespace Crafter;
+
+extern "C" Configuration CrafterBuildProject(std::span<const std::string_view>) {
+    Configuration cfg;
+    cfg.path = "./";
+    cfg.name = "rc-meta";
+    cfg.outputName = "rc-meta";
+    cfg.target = "x86_64-pc-linux-gnu";
+    cfg.type = ConfigurationType::Executable;
+
+    auto addTest = [&](std::string name) {
+        Test t;
+        t.config.path = "./";
+        t.config.name = name;
+        t.config.outputName = name;
+        t.config.target = "x86_64-pc-linux-gnu";
+        t.config.type = ConfigurationType::Executable;
+        std::array<fs::path, 0> empty = {};
+        std::array<fs::path, 1> impls = { fs::path("tests") / name };
+        t.config.GetInterfacesAndImplementations(empty, impls);
+        cfg.tests.push_back(std::move(t));
+    };
+
+    addTest("Pass");
+    addTest("Fail");
+    addTest("Crash");
+    addTest("Hang");
+
+    return cfg;
+}

tests/RunnerClassification/inner/tests/Crash.cpp

@@ -0,0 +1,4 @@
+int main() {
+    *(volatile int*)0 = 0;
+    return 0;
+}

tests/RunnerClassification/inner/tests/Fail.cpp

@@ -0,0 +1 @@
+int main() { return 1; }

tests/RunnerClassification/inner/tests/Hang.cpp

@@ -0,0 +1,3 @@
+int main() {
+    for (;;) {}
+}

tests/RunnerClassification/inner/tests/Pass.cpp

@@ -0,0 +1 @@
+int main() { return 0; }

tests/RunnerClassification/project.cpp

@@ -0,0 +1,20 @@
+import std;
+import Crafter.Build;
+namespace fs = std::filesystem;
+using namespace Crafter;
+
+extern "C" Configuration CrafterBuildProject(std::span<const std::string_view>) {
+    Configuration cfg;
+    cfg.path = "tests/RunnerClassification/";
+    cfg.name = "RunnerClassification";
+    cfg.outputName = "RunnerClassification";
+    cfg.target = "x86_64-pc-linux-gnu";
+    cfg.type = ConfigurationType::Executable;
+    cfg.dependencies = { ParentLib("crafter.build-lib") };
+    cfg.linkFlags.push_back("-Wl,--export-dynamic");
+    cfg.linkFlags.push_back("-ldl");
+    std::array<fs::path, 0> ifaces = {};
+    std::array<fs::path, 1> impls = { "RunnerClassification" };
+    cfg.GetInterfacesAndImplementations(ifaces, impls);
+    return cfg;
+}