Educates refactoring

[jorgemoralespou]

•  Refactoring to avoid code duplication.
  • We have added examples to every command, added arguments validation and refactored/moved code around.
  • Upgraded functionality for educates local config edit that does validation and prevents saving on error
  • New educates local mirror list command
  •  Updates kind to latest (0.31.0)
  •  Adds a --kubernetes-version flag to educates create-cluster and defaults to 1.34 and defines the kind images by sha to use.
  • Refactored registry and mirror code to remove code duplication and improve performance
  • Enhancements to educates docker workshop deploy. It creates port bindings for additional services containers.
  • Adds labels to all educates containers in docker.
• Docker compose has been upgraded from v2 to v5.0.1 to later support more local capabilities. Fixes Support docker compose v5 #817
• Added multinode support for local educates (1 control plane, up to 5 worker nodes) (Added docs)
• Added support for node labels and node taints. Specially useful on multinode. (Added docs)
• Fixed ips for registry and mirrors. Fixes Local kind cluster ip change might cause issues #850
  • Local registry will now get by default 172.18.200.1 (so kind network with 200.1 as offset)
  • Every mirror will also get a similar offset but hashed by registry name and if there's collision, will increase by 1 until available.
  • We have simplified how the check for port 80/443 availability on cluster creation was done
  • We now detect if it's a disconnected install (by checking connection to docker hub) and if not available, we set do skip-image-resolution at install time.
• Add overlays to installer Add overlays to installer #873
• Remove options from help as we don't use global flags (a.k.a options). Fixes The new-workshop command help strings says it has an options sub command. #869
• Add cluster portal export command to export a training portal and related workshops to stdout or files. Fixes new export-portal CLI command #91
• Add docs for new features, updates
• Add release notes for new features, updates, etc...

This has been rebased on latest develop, and updated to supersede #855. More commits will come later but guaranteeing that we keep this aligned with develop.
With these changes, you can now survive Docker Desktop restarts and also install Educates on a machine without internet connection (as long as prepopulated mirrors and docker images are already present on the system). Supersedes #851

[GrahamDumpleton]

Develop has been setup for 4.0.0 and project-docs/release-notes/version-4.0.0.md file added. Can you sort out conflicts on this PR and add anything appropriate to release notes file.

[jorgemoralespou]

@GrahamDumpleton due to the work I've been doing on the helm installer and that this PR is long outdated, I will keep it as reference for smaller targeted PR once that helm-installer PR is done and merged to 4.0

Since there's 2 bigs PR, and the change surface is similar, and the other one is way newer, that is the best approach.