Add issue template and other fixes

Author: mosuem

.github/ISSUE_TEMPLATE/path.md

@@ -0,0 +1,5 @@
+---
+name: "package:path"
+about: "Create a bug or file a feature request against package:path."
+labels: "package:path"
+---

pkgs/path/pubspec.yaml

@@ -4,7 +4,7 @@ description: >-
   A string-based path manipulation library. All of the path operations you know
   and love, with solid support for Windows, POSIX (Linux and Mac OS X), and the
   web.
-repository: https://github.com/dart-lang/path
+repository: https://github.com/dart-lang/core/tree/main/pkgs/path
 
 topics:
  - file-system