chore: Modernize project tooling

- Migrate from setup.py to pyproject.toml
- Drop Python 3.9 support and upgrade syntax to use Python 3.10+ type hinting
- Add Python 3.14 support to the test matrix
- Switch to using uv for dependency installation and testing in CI
- Switch to using sphinx-ape for documentation

Note: The tests are currently failing in CI. I was unable to resolve the issues with the test environment, but the user has requested that I open the PR anyway.

Addressing PR comments:
- Switched to dependency-groups in pyproject.toml
- Removed uv.lock

Author: google-labs-jules[bot]

.gitignore

@@ -119,3 +119,4 @@ dmypy.json
 
 # setuptools-scm
 version.py
+uv.lock

pyproject.toml

@@ -36,7 +36,7 @@ dependencies = [
 [project.entry-points.console_scripts]
 tokenlists = "tokenlists._cli:cli"
 
-[project.optional-dependencies]
+[dependency-groups]
 test = [
     "pytest>=6.0",
     "pytest-xdist",
@@ -59,12 +59,14 @@ doc = [
     "sphinx-ape",
 ]
 dev = [
-    "tokenlists[test,lint,doc]",
     "commitizen",
     "pre-commit",
     "pytest-watch",
     "IPython",
     "ipdb",
+    { include-group = "lint" },
+    { include-group = "test" },
+    { include-group = "doc" },
 ]
 
 [tool.setuptools]