chore: update issue template labels to type:bug / type:feature

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: plagness

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,6 +1,6 @@
 name: Bug report
 description: Report a reproducible problem
-labels: [bug]
+labels: [type:bug]
 body:
   - type: textarea
     id: current

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,6 +1,6 @@
 name: Feature request
 description: Propose an improvement
-labels: [enhancement]
+labels: [type:feature]
 body:
   - type: textarea
     id: problem