fun: HTTP RPC framework with DI, guards, streams and codegen

- Service binding via reflection with 4 method signatures
- Dependency injection (Wired/auto tags) and guards
- Streamable HTTP (NDJSON) streaming responses
- Go/TypeScript client code generation (self-contained, with interceptors)
- Enum support, structured Result, logging
- 16 regression tests covering all fixed bugs

request.go

@@ -0,0 +1,14 @@
+package fun
+
+const (
+	RequestNormalType uint8 = iota
+	RequestStreamType
+)
+
+type RequestInfo[T any] struct {
+	MethodName  string
+	ServiceName string
+	Data        *T
+	State       map[string]string
+	Type        uint8
+}