chore: use discussions for feature requests

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,8 @@
 blank_issues_enabled: false
 contact_links:
+  - name: Feature requests
+    url: https://github.com/orgs/fluxerapp/discussions
+    about: Suggest an improvement or new capability.
   - name: Security vulnerability report
     url: https://fluxer.app/security
     about: Please report security issues privately using our security policy.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,42 +0,0 @@
-name: Feature request
-description: Suggest an improvement or new capability
-labels: ['enhancement']
-body:
-  - type: markdown
-    attributes:
-      value: |
-        Thanks for the suggestion.
-
-        For larger changes, please align with maintainers before investing time.
-        Security issues should go to https://fluxer.app/security.
-  - type: textarea
-    id: problem
-    attributes:
-      label: Problem
-      description: What problem are you trying to solve, and for whom?
-      placeholder: "Right now, users can't ..., which causes ..."
-    validations:
-      required: true
-  - type: textarea
-    id: proposal
-    attributes:
-      label: Proposed solution
-      description: What would you like to see happen?
-      placeholder: "Add ..., so that ..."
-    validations:
-      required: true
-  - type: textarea
-    id: notes
-    attributes:
-      label: Notes (optional)
-      description: Constraints, rough plan, or links to relevant code.
-      placeholder: "Notes: ...\nPotential files/areas: ..."
-    validations:
-      required: false
-  - type: checkboxes
-    id: checks
-    attributes:
-      label: Checks
-      options:
-        - label: I searched for existing issues and didn't find a duplicate.
-          required: true