feat: add api context type

api/context.go

@@ -0,0 +1,17 @@
+package api
+
+import (
+	"net/http"
+)
+
+// Ctx contains additional information for handlers
+//
+// usually input/output arguments built by aicra are sufficient
+// but the Ctx lets you manage your request from scratch if required
+//
+// If required, set api.Ctx as the first argument of your handler; if you
+// don't need it, only use standard input arguments and it will be ignored
+type Ctx struct {
+	w http.ResponseWriter
+	r *http.Request
+}