build: Correct some config urls and add some missing comments.

Author: feanil

backend/pyproject.toml

@@ -33,7 +33,8 @@ sample_plugin = "sample_plugin.apps:SamplePluginConfig"
 sample_plugin = "sample_plugin.apps:SamplePluginConfig"
 
 [project.urls]
-source = "https://openedx.org/openedx/sample-plugin"
+Homepage = "https://openedx.org/openedx/sample-plugin"
+Repository = "https://openedx.org/openedx/sample-plugin"
 
 [tool.setuptools.dynamic]
 version = {attr = "sample_plugin.__version__"}

backend/requirements/base.in

@@ -6,4 +6,4 @@ edx-opaque-keys        # Open edX CourseKeyField
 openedx-events         # Be able to listen to openedx events and respond to them.
 openedx-filters        # Be able to hook into openedx filters and change behavior.
 
-openedx-atlas
+openedx-atlas      # For translations related tooling