docs: add contributor and security guidelines

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,35 @@
+---
+name: Feature request
+about: Suggest a feature, source addition, or product improvement
+title: "[Feature] "
+labels: enhancement
+assignees: ""
+---
+
+## Summary
+
+Describe the feature or source you want added.
+
+## Why This Matters
+
+What problem does this solve for Crucix users?
+
+## Scope
+
+- Bug fix:
+- New source:
+- Dashboard/UI change:
+- LLM/provider change:
+- Other:
+
+## Proposed Behavior
+
+Describe the expected behavior or output.
+
+## Maintenance Impact
+
+Note any API keys, rate limits, paid services, dependencies, or ongoing upkeep this would add.
+
+## Additional Context
+
+Links, examples, screenshots, or references.