Is there a plan to add the ability to manually adjust the number of replicas on nginx controllers in app-routing-system?

I modified the "aks-app-routing-operator" deployment to adjust the number of replica, but it was impossible.
```
apiVersion: apps/v1
kind: Deployment
metadata:
annotations:
deployment.kubernetes.io/revision: "1"
creationTimestamp: "2024-03-12T08:23:16Z"
generation: 15
labels:
app.kubernetes.io/component: ingress-controller
app.kubernetes.io/managed-by: aks-app-routing-operator
app.kubernetes.io/name: nginx
name: nginx
namespace: app-routing-system
ownerReferences:
- apiVersion: approuting.kubernetes.azure.com/v1alpha1
controller: true
kind: NginxIngressController
name: default
uid: 6ea3e476-059e-44b3-9f8d-86655ee2a5dc
resourceVersion: "113876214"
uid: 37ea9332-baaf-47cf-aef4-f69d0ff2abef
spec:
progressDeadlineSeconds: 600
replicas: 2 <=============== I want to revise this
```

Currently, two nging controllers seem to be the default values.
```
kubectl get po -n app-routing-system
NAME READY STATUS RESTARTS AGE
nginx-5d4cbcf56b-nrt46 1/1 Running 0 40h
nginx-5d4cbcf56b-swq58 1/1 Running 0 40h
```

Is there a plan to add the ability to manually adjust the number of replica on the nginx controller?

Start with the NginxIngressController resource and the nginx Deployment it manages in the app-routing-system namespace. Trace how the operator reconciles the deployment and determine where a replica setting could be accepted and preserved. Done means users can manually configure the controller replica count without the operator overwriting it.

Written by the indexing model from the issue text.