docs: add GitHub issue templates (bug report + feature request)

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,33 @@
+name: ✨ Feature Request
+description: Suggest a new feature or improvement
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Have an idea to make PinchChat better? We'd love to hear it!
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem or Motivation
+      description: What problem does this solve, or what's missing?
+      placeholder: I'm always frustrated when...
+    validations:
+      required: true
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed Solution
+      description: Describe the feature or change you'd like.
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives Considered
+      description: Any other approaches you've thought about?
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional Context
+      description: Screenshots, mockups, or links.