setup.py: Add classifiers.

setup.py

@@ -23,5 +23,15 @@ setup(
     python_requires               = "~=3.7",
     install_requires              = ["litex"],
     include_package_data          = True,
+    keywords                      = "HDL ASIC FPGA hardware design",
+    classifiers                   = [
+        "Topic :: Scientific/Engineering :: Electronic Design Automation (EDA)",
+        "Environment :: Console",
+        "Development Status :: 3 - Alpha",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: BSD License",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+    ],
     packages                      = find_packages(exclude=['test*']),
 )