Flesh out pyproject.toml to allow properly installing

Mostly because I'd like to be able to install it with uv, so it's
entirely for selfish reasons.

pyproject.toml

@@ -1,13 +1,54 @@
-[tool.black]
+[build-system]
+requires = ["setuptools>=45", "setuptools-scm[toml]>=6.2", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "git-tidy-python"
+dynamic = ["version"]
+description = "A time-saving device for a developer using git."
+authors = [
+    {name = "James Smith"}
+]
+readme = "README.md"
+license = {text = "GPL-3.0-or-later"}
+requires-python = ">=3.8"
+dependencies = []
+keywords = ["git", "cli", "developer-tools", "automation", "branch-management"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.6",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Topic :: Software Development :: Version Control :: Git",
+    "Topic :: Utilities"
+]
+
+[project.scripts]
+git-tidy = "git_tidy:main"
+
+[tool.setuptools]
+py-modules = ["git_tidy"]
+
+[tool.ruff]
 line-length = 120
-include = '\.pyi?$'
 exclude ='''
 /(
-		| \.git
-		| \.mypy_cache
+	| \.git
+	| \.mypy_cache
 )/
 '''
 
 [tool.isort]
 profile = "black"
 line_length = 120
+
+[tool.setuptools_scm]