Expressions: Create json schema for query types (#84032)

pkg/expr/reader.go

@@ -1,6 +1,7 @@
 package expr
 
 import (
+	"embed"
 	"fmt"
 	"strings"
 
@@ -177,6 +178,13 @@ func (h *ExpressionQueryReader) ReadQuery(
 	return eq, err
 }
 
+//go:embed query.types.json
+var f embed.FS
+
+func (h *ExpressionQueryReader) QueryTypeDefinitionListJSON() ([]byte, error) {
+	return f.ReadFile("query.types.json")
+}
+
 func getReferenceVar(exp string, refId string) (string, error) {
 	exp = strings.TrimPrefix(exp, "$")
 	if exp == "" {