feat: implement decision-based routing with plugin architecture

Signed-off-by: bitliu <[email protected]>

Author: Xunzhuo

deploy/helm/semantic-router/crds/vllm.ai_intelligentroutes.yaml

@@ -200,7 +200,21 @@ spec:
                   domains:
                     description: Domains defines MMLU domain categories for classification
                     items:
-                      type: string
+                      description: DomainSignal defines a domain category for classification
+                      properties:
+                        description:
+                          description: Description provides a human-readable description
+                            of this domain
+                          maxLength: 500
+                          type: string
+                        name:
+                          description: Name is the unique identifier for this domain
+                          maxLength: 100
+                          minLength: 1
+                          type: string
+                      required:
+                      - name
+                      type: object
                     maxItems: 14
                     type: array
                   embeddings: