Version 2: major rewrite, cursor positions (#26)

* Reimplement everything based on Python 3.11+ exception handling. Adds exact columns of the error and a caret position if available, removes our own internal data structures but printing HTML tracebacks and usage in Notebooks remains the same.

* Refactor html output to include the whole error line in a span, but only mark the actual error (yellow background), with additional em (red font) for caret position.

* Modernize project toolchain, pyproject/uv/ruff. Script and test running via nox.

* AI-generated tests for 100% coverage, including numpy and torch tensors.

* Implement tracerite[nb] extra that installs jupyter notebook packages, for convenience.

* Move tooltips to a separate span, fixing emoji symbol positioning.

* style: Remove code element default background (that vscode was adding).

* style: Tooltips are no longer popups but always shown.

* style: a lot more style, Monaspace fonts

Author: Tronic

.github/workflows/python-publish.yml

@@ -1,18 +1,35 @@
-__pycache__
-*$py.class
+# Ignore all dotfiles and hidden directories
 .*
-!.gitignore
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Distribution / packaging
 build/
 develop-eggs/
 dist/
 downloads/
 eggs/
+lib/
+lib64/
+parts/
 sdist/
+var/
 wheels/
-pip-wheel-metadata/
 share/python-wheels/
 *.egg-info/
 *.egg
-*.eggs/
-*.lock
 MANIFEST
+
+# Unit test / coverage reports
+htmlcov/
+coverage.xml
+*.cover
+*.py,cover
+cover/
+
+# Package managers
+*.lock
+__pypackages__/