v2: Initial clean branch with unit tests + CI/CD pipeline

- Started from ac75faa (initial E4B-MarkBase integration)
- Kept Sources/ (all engine code) + Package.swift + .gitignore
- Removed all ad-hoc tests, documentation, scripts, Python files
- Added Tests/00_Unit/ (MathTest, TokenizerTest, SamplerTest)
- Added .gitea/workflows/ci.yaml (build + unit tests + lint)
- Added Scripts/check_resources.sh (memory-aware test runner)
- Added Tests/Manifest.json (resource requirements for all tests)
- Focus: 4-bit quantized models only

Sources/MarkBaseServer/main.swift

@@ -0,0 +1,12 @@
+import Foundation
+
+// Entry point — avoids @main conflict with top-level code
+Task {
+    do {
+        try await SimpleServerApp.main()
+    } catch {
+        print("Server error: \(error)")
+        exit(1)
+    }
+}
+dispatchMain()