feat: PEP 794 support

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

src/validate_pyproject/project_metadata.schema.json

@@ -233,6 +233,20 @@
         }
       }
     },
+    "import-names": {
+      "description": "Lists import names which a project, when installed, would exclusively provide.",
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
+    },
+    "import-namespaces": {
+      "description": "Lists import names that, when installed, would be provided by the project, but not exclusively.",
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
+    },
     "dynamic": {
       "type": "array",
       "$$description": [
@@ -256,7 +270,9 @@
           "gui-scripts",
           "entry-points",
           "dependencies",
-          "optional-dependencies"
+          "optional-dependencies",
+          "import-names",
+          "import-namespaces"
         ]
       }
     }

tests/examples/pdm/pyproject.toml

@@ -11,6 +11,7 @@ requires-python = ">=3.9"
 readme = "README.md"
 keywords = ["packaging", "PEP 517", "build"]
 dynamic = ["version"]
+import-names = ["pdm.backend"]
 
 classifiers = [
     "Development Status :: 5 - Production/Stable",

tests/examples/trampolim/pyproject.toml

@@ -23,7 +23,7 @@ classifiers = [
   'Development Status :: 4 - Beta',
   'Programming Language :: Python'
 ]
-
+import-namespaces = ["trampolim"]
 dependencies = [
   'tomli>=1.0.0',
   'packaging',