Add new /$DB/$TABLE/-/script endpoint, for transactional SQL scripts with the JSON Write API.

[asg017]

Feature idea from Discord. Gave it to Claude to come up with a first pass, but still need to read/test.

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📚 Documentation preview 📚: https://datasette--2607.org.readthedocs.build/en/2607/

[codecov]

Codecov Report

❌ Patch coverage is 96.42857% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.25%. Comparing base (2ca00b6) to head (8eb5b3a).

Files with missing lines	Patch %	Lines
datasette/views/table.py	95.91%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2607      +/-   ##
==========================================
+ Coverage   90.20%   90.25%   +0.04%     
==========================================
  Files          51       51              
  Lines        7497     7553      +56     
==========================================
+ Hits         6763     6817      +54     
- Misses        734      736       +2     

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