feat: migrate package metadata to pyproject.toml

Migrates package metadata from setup.py including version, dependencies,
and package definitions.

Changes package name from "Open edX" to "openedx-platform" to comply
with PEP 508 (no spaces allowed). This is safe as the package is not
published and dependents rely on entry points, not the package name.

Simplifies setup.py to contain only entry_points, which will be migrated
in subsequent commits.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -1,3 +1,15 @@
 [build-system]
 requires = ["setuptools>=61.0"]
 build-backend = "setuptools.build_meta"
+
+[project]
+name = "openedx-platform"
+version = "0.13"
+requires-python = ">=3.11"
+dependencies = ["setuptools"]
+
+[tool.setuptools]
+packages = ["cms", "common", "lms", "openedx", "xmodule"]
+
+[tool.setuptools.package-data]
+xmodule = ["js/module/*"]

setup.py

@@ -45,22 +45,6 @@ XBLOCKS_ASIDES = [
 
 
 setup(
-    name="Open edX",
-    version='0.13',
-    install_requires=["setuptools"],
-    requires=[],
-    # NOTE: These are not the names we should be installing.  This tree should
-    # be reorganized to be a more conventional Python tree.
-    packages=[
-        "cms",
-        "common",
-        "lms",
-        "openedx",
-        "xmodule",
-    ],
-    package_data={
-        'xmodule': ['js/module/*'],
-    },
     entry_points={
         "openedx.course_tab": [
             "ccx = lms.djangoapps.ccx.plugins:CcxCourseTab",