Add Regex Inspector and Email Inspector example.

[MooooCat]

Description

Motivation and Context

How has this been tested?

Types of changes

• Maintenance (no change in code, maintain the project's CI, docs, etc.)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (fc5201e) 79.13% compared to head (378d0a9) 80.00%.

Files	Patch %	Lines
sdgx/data_models/inspectors/regex.py	98.27%	1 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #115      +/-   ##
==========================================
+ Coverage   79.13%   80.00%   +0.87%     
==========================================
  Files          64       66       +2     
  Lines        2823     2926     +103     
==========================================
+ Hits         2234     2341     +107     
+ Misses        589      585       -4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Wh1isper]

Can we test all default Inspector in https://github.com/hitsz-ids/synthetic-data-generator/blob/main/tests/manager/test_inspector_manager.py to verify that the default behaviour is normal and to ensure minimum availability.

[MooooCat]

Can we test all default Inspector in https://github.com/hitsz-ids/synthetic-data-generator/blob/main/tests/manager/test_inspector_manager.py to verify that the default behaviour is normal and to ensure minimum availability.

Ah, using manager is a good idea. （妙啊）