📝 add more documentation

doc/mkdocs/docs/api/basic_json/dump.md

@@ -14,7 +14,7 @@ and `ensure_ascii` parameters.
 ## Parameters
 
 `indent` (in)
-:   If indent is nonnegative, then array elements and object
+:   If `indent` is nonnegative, then array elements and object
     members will be pretty-printed with that indent level. An indent level of
     `0` will only insert newlines. `-1` (the default) selects the most compact
     representation.

doc/mkdocs/docs/api/basic_json/index.md

 # Overview
 
+!!! note
+    
+    This page is under construction.
+
 ## Member functions
 
 ### Object inspection