chore: backport pydeck 0.9.3 release fixes to master

[chrisgervang]

Summary

• fix(pydeck): add trailing newline in bump_version.py templates
• fix(pydeck): disable legacy tooltip in widgets example to avoid duplicate tooltips
• pydeck 0.9.3 version bump (pyproject.toml, _version.py, docs/conf.py)

Cherry-picked from 9.3-release after the pydeck 0.9.3 release.

Test plan

• Pre-commit hooks pass (lint, prettier, vitest)
• pydeck pytest suite passes
• Verified pydeck 0.9.3 from test PyPI renders widgets correctly

🤖 Generated with Claude Code

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Note

Low Risk
Release hygiene and a documentation/example tweak only; no runtime API or security changes.

Overview
Backports pydeck 0.9.3 packaging and example fixes from the release branch.

Version bump to 0.9.3 in pyproject.toml, pydeck/_version.py, and Sphinx docs/conf.py.

bump_version.py Jinja templates for _version.py and frontend_semver.py now append a trailing newline so generated files match typical POSIX formatting.

examples/widgets.py sets tooltip=False on Deck so the legacy deck tooltip does not stack on top of InfoWidget hover tooltips.

^{Reviewed by Cursor Bugbot for commit f6fdd04. Bugbot is set up for automated code reviews on this repo. Configure here.}

[coveralls]

coverage: 83.112%. remained the same — cherry-pick/post-release-fixes into master