support json obj and array

[ZhouBox]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.47458% with 39 lines in your changes missing coverage. Please review.

Project coverage is 75.34%. Comparing base (abd58af) to head (ef6bb14).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
src/utils/json.c	79.04%	35 Missing ⚠️
plugins/mqtt/mqtt_handle.c	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2320      +/-   ##
==========================================
+ Coverage   75.10%   75.34%   +0.24%     
==========================================
  Files         113      113              
  Lines       22735    23055     +320     
==========================================
+ Hits        17074    17371     +297     
- Misses       5661     5684      +23     

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