chore: add some metadata

pyproject.toml

@@ -1,10 +1,20 @@
 [tool.poetry]
 name = "rpca"
 version = "0.1.0"
-description = ""
+description = "Robust PCA using Accelerated Alternating Projection"
 authors = ["Loic Coyle <[email protected]>"]
 readme = "README.md"
 license = "MIT"
+keywords = ["robust pca", "rpca", "sklearn", "dimensionality reduction"]
+repository = "https://github.com/loiccoyle/RPCA"
+classifiers = [
+    "Topic :: Software Development :: Libraries :: Python Modules",
+    "Programming Language :: Python :: 3 :: Only",
+    "Operating System :: MacOS",
+    "Operating System :: Microsoft :: Windows",
+    "Operating System :: POSIX :: Linux",
+    "License :: OSI Approved :: MIT License",
+]
 
 [tool.poetry.dependencies]
 python = ">=3.9,<3.13"