docs(blog): added blog post explaining operatorless istio changes

General MR

Summary

This MR adds a blog post explaining the incoming istio changes for Big Bang 3.0.

Linked Issue

Closes #2561 (closed)

Upgrade Notices

N/A

blog/bb-3-0-operatorless-istio-migration.md

 # Big Bang 3.0 - Operatorless Istio Migration
 
-It's been nearly two years since the 2.0 release of Big Bang, and the project
-has seen significant growth and adoption in that time. The Big Bang engineering
-team is proud of what we've built in partnership with our growing community.
-Your support and feedback have been invaluable in shaping the platform your
-missions depend on.
+It has been nearly two years since the Big Bang 2.0 release, and the project has grown significantly in that time. The Big Bang engineering team is proud of the product that we have built alongside our growing community. Your support and feedback have been essential in shaping the platform your missions rely on.
 
-In keeping with our mission-first principles, we want to share some updates on
-where we're steering Big Bang and what that may mean for you as Big Bang
-operators.
+In line with our mission-first principles, we want to share updates on the direction of Big Bang and what it means for you as Big Bang operators.
 
 ## Istio Operator Deprecation
 
-The Istio project announced back in
-[August 2024](https://istio.io/latest/blog/2024/in-cluster-operator-deprecation-announcement/)
-that they were deprecating the Istio Operator after Istio 1.23. Helm 3 addressed
-many of the issues that Helm 2 had, which initially led to the operator's
-creation. Additionally, Istio’s statistics showed that less than 10% of its
-install base used the operator, with most installations relying on `istioctl`.
+In August 2024, the Istio project [announced](https://istio.io/latest/blog/2024/in-cluster-operator-deprecation-announcement/) the deprecation of the Istio Operator in Istio 1.24. The Istio Operator was created to address many of the problems with Helm 2. Helm 3 resolved many of those issues. Additionally, the Istio project's data showed that less than 10% of installations used the operator, with most relying on istioctl for initial deployment and upgrades.
+Big Bang uses a declarative approach to application deployments. With 3.0, we've included a declarative approach for installing Istio into Kubernetes clusters without the operator or istioctl.
 
 Istio 1.23 has a
 [generous EOL timeline](https://istio.io/latest/docs/releases/supported-releases/#support-status-of-istio-releases),