Add public paste CLI and skill

Provide a zero-dependency Python tool that races multiple public paste providers and documents safe AI-tool usage through a project skill.

pyproject.toml

@@ -0,0 +1,33 @@
+[build-system]
+requires = ["setuptools>=61"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "publicpaste"
+version = "0.1.0"
+description = "Paste text to the first working public paste provider."
+readme = "README.md"
+requires-python = ">=3.9"
+license = { text = "MIT" }
+authors = [{ name = "publicpaste contributors" }]
+keywords = ["paste", "cli", "public", "snippet"]
+classifiers = [
+  "Development Status :: 3 - Alpha",
+  "Environment :: Console",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: MIT License",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3 :: Only",
+  "Topic :: Utilities",
+]
+dependencies = []
+
+[project.scripts]
+publicpaste = "publicpaste.cli:main"
+
+[tool.setuptools.packages.find]
+include = ["publicpaste*"]
+
+[tool.pytest.ini_options]
+addopts = "-q"
+testpaths = ["tests"]