add SparkMonitor and itables extension

[Tianhao-Gu]

SparkMonitor extension:

iTables extension:

[codecov]

Codecov Report

Attention: Patch coverage is 38.88889% with 11 lines in your changes missing coverage. Please review.

Project coverage is 50.00%. Comparing base (2ad24f5) to head (7f38ec8).

❗ Current head 7f38ec8 differs from pull request most recent head df3bfe8

Please upload reports for the commit df3bfe8 to get more accurate results.

Files	Patch %	Lines
src/notebook_utils/notebook_utils.py	37.50%	10 Missing ⚠️
src/spark/utils.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
- Coverage   52.50%   50.00%   -2.50%     
==========================================
  Files           3        4       +1     
  Lines          80       98      +18     
==========================================
+ Hits           42       49       +7     
- Misses         38       49      +11     

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