🏷️ sparse: overhauled stubs for diags_array, eye_array, and their matrix equivalents

Author: julvdb

.vscode/settings.json

@@ -33,6 +33,9 @@
     "editor.tabSize": 2,
   },
   "dprint.path": ".venv/bin/dprint",
+  "code-runner.executorMap": {
+    "python": "cd \"$workspaceRoot\" && source \".venv/bin/activate\" && uvx basedpyright $fullFileName && python $fullFileName",
+  },
   "mypy-type-checker.path": [
     "uv",
     "run",