Revise Project Learning Objectives

## Overview

This course currently has a few projects that have learning objectives defined. However, they can be improved. This ticket will list the changes we want to make and where we want to make them.

## Marking tasks as Core and Stretch

Currently it is not clear when a project is done, versus what are stretch goals.

We should define each task as being core and stretch. So those doing it know when they can consider the work done, as opposed to pushing themselves.

## Extract core objectives as success criteria

Once we have marked what is core versus what is stretch, we should define the success criteria based on the core objectives. This will provide people with a good overview of what they need to learn from the project, and reinforce the stretch goals as being not required to take away the key learnings.

## Projects
### [immersive-go-course](https://github.com/CodeYourFuture/immersive-go-course)
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/batch-processing
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/buggy-app
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/cli-files
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/docker-cloud
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/grpc-client-server
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/http-auth
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/kafka-cron
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/memcached-clusters
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/multiple-servers
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/raft-otel
- [ ] https://github.com/CodeYourFuture/immersive-go-course/tree/main/projects/server-database