docs: link to org Discussions community hub

Add issue template contact_links + README section pointing to
https://github.com/orgs/opendecree/discussions as the single community
surface for all OpenDecree repos.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: zeev-dreifuss-ownera

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: true
+contact_links:
+  - name: Community Discussions
+    url: https://github.com/orgs/opendecree/discussions
+    about: Questions, ideas, and show-and-tell — ask here before filing an issue.

README.md

@@ -85,6 +85,10 @@ For detailed concepts (schemas, typed values, versioning, auth), see the [main O
 - Python 3.11+
 - A running OpenDecree server (v0.3.0+)
 
+## Questions?
+
+Head to [OpenDecree Discussions](https://github.com/orgs/opendecree/discussions) — our community hub covers all OpenDecree repos.
+
 ## License
 
 Apache License 2.0 — see [LICENSE](LICENSE).