chore: address P2/P3 audit findings

- Add explicit .j2 and py.typed inclusion rule in gds-domains build config
- Update issue template dropdowns to match new 8-package structure
- Remove dead source code from all 8 shim packages (only __init__.py
  shims remain, reducing noise for contributors)

Author: rohan

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -9,10 +9,12 @@ body:
       description: Which package is affected?
       options:
         - gds-framework
+        - gds-domains
+        - gds-sim
+        - gds-continuous
+        - gds-analysis
+        - gds-interchange
         - gds-viz
-        - gds-games
-        - gds-stockflow
-        - gds-control
         - gds-examples
     validations:
       required: true

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -9,10 +9,12 @@ body:
       description: Which package does this relate to?
       options:
         - gds-framework
+        - gds-domains
+        - gds-sim
+        - gds-continuous
+        - gds-analysis
+        - gds-interchange
         - gds-viz
-        - gds-games
-        - gds-stockflow
-        - gds-control
         - gds-examples
         - Other/New
     validations: