Add new example of SearchQnA for GenAIExample (#448)

Signed-off-by: zhlsunshine <huailong.zhang@intel.com>

SearchQnA/kubernetes/README.md

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+<h1 align="center" id="title">Deploy SearchQnA in a Kubernetes Cluster</h1>
+
+This document outlines the deployment process for a Code Generation (SearchQnA) application that utilizes the [GenAIComps](https://github.com/opea-project/GenAIComps.git) microservice components on Intel Xeon servers and Gaudi machines.
+
+Please install GMC in your Kubernetes cluster, if you have not already done so, by following the steps in Section "Getting Started" at [GMC Install](https://github.com/opea-project/GenAIInfra/tree/main/microservices-connector#readme). We will soon publish images to Docker Hub, at which point no builds will be required, further simplifying install.
+
+If you have only Intel Xeon machines you could use the searchQnA_xeon.yaml file or if you have a Gaudi cluster you could use searchQnA_gaudi.yaml
+In the below example we illustrate on Xeon.
+
+## Deploy the RAG application
+
+1. Create the desired namespace if it does not already exist and deploy the application
+```bash
+export APP_NAMESPACE=CT
+kubectl create ns $APP_NAMESPACE
+sed -i "s|namespace: searchqa|namespace: $APP_NAMESPACE|g"  ./searchQnA_xeon.yaml
+kubectl apply -f ./searchQnA_xeon.yaml
+```
+
+2. Check if the application is up and ready
+```bash
+kubectl get pods -n $APP_NAMESPACE
+```
+
+3. Deploy a client pod for testing
+```bash
+kubectl create deployment client-test -n $APP_NAMESPACE --image=python:3.8.13 -- sleep infinity
+```
+
+4. Check that client pod is ready
+```bash
+    kubectl get pods -n $APP_NAMESPACE
+```
+
+5. Send request to application
+```bash
+export CLIENT_POD=$(kubectl get pod -n $APP_NAMESPACE -l app=client-test -o jsonpath={.items..metadata.name})
+export accessUrl=$(kubectl get gmc -n $APP_NAMESPACE -o jsonpath="{.items[?(@.metadata.name=='searchqa')].status.accessUrl}")
+kubectl exec "$CLIENT_POD" -n $APP_NAMESPACE -- curl $accessUrl -X POST -d '{"text":"What is the latest news? Give me also the source link."}' -H 'Content-Type: application/json' > $LOG_PATH/gmc_searchqa.log
+```

SearchQnA/kubernetes/searchQnA_gaudi.yaml

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+# Copyright (C) 2024 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+apiVersion: gmc.opea.io/v1alpha3
+kind: GMConnector
+metadata:
+  labels:
+    app.kubernetes.io/name: gmconnector
+    app.kubernetes.io/managed-by: kustomize
+    gmc/platform: gaudi
+  name: searchqa
+  namespace: searchqa
+spec:
+  routerConfig:
+    name: router
+    serviceName: router-service
+  nodes:
+    root:
+      routerType: Sequence
+      steps:
+      - name: Embedding
+        internalService:
+          serviceName: embedding-svc
+          config:
+            endpoint: /v1/embeddings
+            TEI_EMBEDDING_ENDPOINT: tei-embedding-gaudi-svc
+      - name: TeiEmbeddingGaudi
+        internalService:
+          serviceName: tei-embedding-gaudi-svc
+          isDownstreamService: true
+      - name: WebRetriever
+        data: $response
+        internalService:
+          serviceName: web-retriever-svc
+          config:
+            endpoint: /v1/web_retrieval
+            TEI_EMBEDDING_ENDPOINT: tei-embedding-gaudi-svc
+            GOOGLE_API_KEY: "insert-your-google-api-key-here"
+            GOOGLE_CSE_ID: "insert-your-google-cse-id-here"
+      - name: Reranking
+        data: $response
+        internalService:
+          serviceName: reranking-svc
+          config:
+            endpoint: /v1/reranking
+            TEI_RERANKING_ENDPOINT: tei-reranking-svc
+      - name: TeiReranking
+        internalService:
+          serviceName: tei-reranking-svc
+          config:
+            endpoint: /rerank
+          isDownstreamService: true
+      - name: Llm
+        data: $response
+        internalService:
+          serviceName: llm-svc
+          config:
+            endpoint: /v1/chat/completions
+            TGI_LLM_ENDPOINT: tgi-gaudi-svc
+      - name: TgiGaudi
+        internalService:
+          serviceName: tgi-gaudi-svc
+          config:
+            endpoint: /generate
+          isDownstreamService: true

SearchQnA/kubernetes/searchQnA_xeon.yaml

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+# Copyright (C) 2024 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+apiVersion: gmc.opea.io/v1alpha3
+kind: GMConnector
+metadata:
+  labels:
+    app.kubernetes.io/name: gmconnector
+    app.kubernetes.io/managed-by: kustomize
+    gmc/platform: xeon
+  name: searchqa
+  namespace: searchqa
+spec:
+  routerConfig:
+    name: router
+    serviceName: router-service
+  nodes:
+    root:
+      routerType: Sequence
+      steps:
+      - name: Embedding
+        internalService:
+          serviceName: embedding-svc
+          config:
+            endpoint: /v1/embeddings
+            TEI_EMBEDDING_ENDPOINT: tei-embedding-svc
+      - name: TeiEmbedding
+        internalService:
+          serviceName: tei-embedding-svc
+          isDownstreamService: true
+      - name: WebRetriever
+        data: $response
+        internalService:
+          serviceName: web-retriever-svc
+          config:
+            endpoint: /v1/web_retrieval
+            TEI_EMBEDDING_ENDPOINT: tei-embedding-svc
+            GOOGLE_API_KEY: "insert-your-google-api-key-here"
+            GOOGLE_CSE_ID: "insert-your-google-cse-id-here"
+      - name: Reranking
+        data: $response
+        internalService:
+          serviceName: reranking-svc
+          config:
+            endpoint: /v1/reranking
+            TEI_RERANKING_ENDPOINT: tei-reranking-svc
+      - name: TeiReranking
+        internalService:
+          serviceName: tei-reranking-svc
+          config:
+            endpoint: /rerank
+          isDownstreamService: true
+      - name: Llm
+        data: $response
+        internalService:
+          serviceName: llm-svc
+          config:
+            endpoint: /v1/chat/completions
+            TGI_LLM_ENDPOINT: tgi-service-m
+      - name: Tgi
+        internalService:
+          serviceName: tgi-service-m
+          config:
+            endpoint: /generate
+          isDownstreamService: true