Tidy repo for public release

- Add MIT LICENSE
- Polish README: tagline, permissions docs, clone URL
- Add license, authors, readme, and repository URL to pyproject.toml
- Remove stale docs/plans/ (relocated to .cursor/) and requirements.txt
- Deduplicate and clean up .gitignore

Made-with: Cursor

pyproject.toml

@@ -6,6 +6,9 @@ build-backend = "setuptools.build_meta"
 name = "cursor-flasher"
 version = "0.2.0"
 description = "Flash Cursor's window when the AI agent needs attention"
+readme = "README.md"
+license = "MIT"
+authors = [{ name = "cottongin" }]
 requires-python = ">=3.10"
 dependencies = [
     "pyobjc-framework-applicationservices>=12.1",
@@ -17,6 +20,9 @@ dependencies = [
 [project.optional-dependencies]
 dev = ["pytest", "pytest-mock"]
 
+[project.urls]
+Repository = "https://code.cottongin.xyz/cursor-flasher"
+
 [project.scripts]
 cursor-flasher = "cursor_flasher.cli:main"