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

tag.go

@@ -0,0 +1,34 @@
+package fun
+
+import (
+	"reflect"
+	"strings"
+)
+
+type Tag struct {
+	TagList map[string]string
+}
+
+func newTag(tag reflect.StructTag) *Tag {
+	t := &Tag{
+		TagList: map[string]string{},
+	}
+	pairs := strings.Split(strings.TrimSpace(tag.Get("fun")), ";")
+	for _, pair := range pairs {
+		if pair == "" {
+			continue
+		}
+		keyValue := strings.Split(pair, ":")
+		if len(keyValue) == 1 {
+			t.TagList[keyValue[0]] = ""
+		} else {
+			t.TagList[keyValue[0]] = keyValue[1]
+		}
+	}
+	return t
+}
+
+func (tag *Tag) getTag(key string) (string, bool) {
+	v, ok := tag.TagList[key]
+	return v, ok
+}