chore: add classifiers to pyproject.toml for better package metadata

Author: ya7010

pyproject.toml

@@ -10,6 +10,19 @@ dependencies = [
   "python-pptx>=1.0.2",
   "typing-extensions>=4.13.2",
 ]
+classifiers = [
+  "Typing :: Typed",
+  "Topic :: Software Development :: Libraries :: Python Modules",
+  "Development Status :: 3 - Alpha",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: MIT License",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: 3.14",
+  "Topic :: Office/Business :: Office Suites",
+]
 
 [project.optional-dependencies]
 pandas = ["pandas>=2.0.0"]