feat: add openrouter/elephant-alpha to curated model lists (#9378)

* Add hermes debug share instructions to all issue templates

- bug_report.yml: Add required Debug Report section with hermes debug share
  and /debug instructions, make OS/Python/Hermes version optional (covered
  by debug report), demote old logs field to optional supplementary
- setup_help.yml: Replace hermes doctor reference with hermes debug share,
  add Debug Report section with fallback chain (debug share -> --local -> doctor)
- feature_request.yml: Add optional Debug Report section for environment context

All templates now guide users to run hermes debug share (or /debug in chat)
and paste the resulting paste.rs links, giving maintainers system info,
config, and recent logs in one step.

* feat: add openrouter/elephant-alpha to curated model lists

- Add to OPENROUTER_MODELS (free, positioned above GPT models)
- Add to _PROVIDER_MODELS["nous"] mirror list
- Add 256K context window fallback in model_metadata.py

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -71,3 +71,15 @@ body:
       label: Contribution
       options:
         - label: I'd like to implement this myself and submit a PR
+
+  - type: textarea
+    id: debug-report
+    attributes:
+      label: Debug Report (optional)
+      description: |
+        If this feature request is related to a problem you're experiencing, run `hermes debug share` and paste the links here.
+        In an interactive chat session, you can use `/debug` instead.
+        This helps us understand your environment and any related logs.
+      placeholder: |
+        Report   https://paste.rs/abc123
+      render: shell