feat: add syntax highlighting, and search + level filter to console

[tlambert03]

wip PR to add syntax highlighting, log-level filtering, and search-filtering to the console widget:

[codecov]

Codecov Report

❌ Patch coverage is 74.67532% with 39 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.75%. Comparing base (925e289) to head (e9404e3).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/pymmcore_widgets/_log.py	74.67%	39 Missing ⚠️

❌ Your patch check has failed because the patch coverage (74.67%) is below the target coverage (85.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #546      +/-   ##
==========================================
- Coverage   86.89%   86.75%   -0.15%     
==========================================
  Files         115      115              
  Lines       14112    14257     +145     
==========================================
+ Hits        12262    12368     +106     
- Misses       1850     1889      +39     

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