feat: refactor config file

[onedr0p]

Fixes: #1249

• Completely refactors the config file to be more structured: https://github.com/onedr0p/flux-cluster-template/blob/config-rerefactor/config.sample.yaml
• Moved config.yaml to the root of the repo. (used to be bootstrap/vars/config.yaml)
• Flux can be be disabled which will just generate the cluster bootstrap configuration. This is helpful if people want to go at Flux their own way, or use another tool for managing Kubernetes (e.g. Argo, kubectl, kluctl etc..)
• Cloudflare can be disabled if Flux is enabled. This is helpful if people want to go at DNS, TLS and Tunneling their own way instead of using Cloudflare. Disabling Cloudflare will make it so the entire network namespace is omitted when templating out the Flux resources, also no cert-manager issuers or flux webhook ingresses are created.
• Added conditions to the helm repos, and only templates them when needed.
• Moved kubeconform.sh to ./scripts directory since it is used by taskfiles and github workflows

Validation has been changed to bare bones checks until I can get a better way to handle this using Pydantic or whatever.