Feat: supports decimal type

[menshibin]

Description

Supports decimal type.
Optimization of Node.js connector WebSocket poll.

Jira: https://jira.taosdata.com:18080/browse/TD-34375
Jira: https://jira.taosdata.com:18080/browse/TD-34005

Checklist

Please check the items in the checklist if applicable.

• Is the user manual updated?
• Are the test cases passed and automated?
• Is there no significant decrease in test coverage?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.61%. Comparing base (28a2d3a) to head (101a99d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
+ Coverage   81.50%   81.61%   +0.11%     
==========================================
  Files          24       24              
  Lines        1849     1904      +55     
  Branches      259      267       +8     
==========================================
+ Hits         1507     1554      +47     
- Misses        269      272       +3     
- Partials       73       78       +5     

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[sheyanjie-qq]

pls see the commens