Add agentic issue triage workflow (#2484) (#3012)

* Add agentic issue triage workflow (#2484)

Adds a gh-aw Issue Triage Agent that classifies new/reopened issues, applies classification, area, and special labels, sets Issue Type and Priority fields, and posts a rationale comment with an owner recommendation.

Author: RickWinter

.github/aw/actions-lock.json

@@ -5,10 +5,10 @@
       "version": "v9.0.0",
       "sha": "3a2844b7e9c422d3c10d287c895573f7108da1b3"
     },
-    "github/gh-aw-actions/setup@v0.74.4": {
+    "github/gh-aw-actions/setup@v0.81.6": {
       "repo": "github/gh-aw-actions/setup",
-      "version": "v0.74.4",
-      "sha": "d3abfe96a194bce3a523ed2093ddedd5704cdf62"
+      "version": "v0.81.6",
+      "sha": "ba6380cc6e5be5d21677bebe04d52fb48e3abec7"
     }
   }
 }