Use distinct type for dependencies' aliases & names

[benbz]

When helm install/helm upgrade the name of dependencies returned with --output json is replaced by their alias (if any).

e.g. https://github.com/goauthentik/helm/blob/authentik-2025.10.0/charts/authentik/Chart.yaml#L40-L44

  - name: authentik-remote-cluster
    repository: https://charts.goauthentik.io
    version: 2.1.0
    condition: serviceAccount.create
    alias: serviceAccount

Results in:

$ helm upgrade -i authentik --output json oci://ghcr.io/goauthentik/helm-charts/authentik:2025.10.0 | jq '.chart.metadata.dependencies[0]'
Pulled: ghcr.io/goauthentik/helm-charts/authentik:2025.10.0
Digest: sha256:8b617e3bcb9f9988fe0be8428cf1f78489236e1a73385cfdd692517a0d269435
{
  "name": "serviceAccount",
  "version": "2.1.0",
  "repository": "https://charts.goauthentik.io",
  "condition": "serviceAccount.create",
  "enabled": true,
  "alias": "serviceAccount"
}

ChartDependency.alias allows an arbitrary non-empty string to be used, so ChartDependency.name needs to match this. #9 attempted to resolve this via changing the Name type, this PR just loosens the restrictions on dependencies[].{name,alias}.

Alternatively this PR could be taken further and impose the restrictions from #9 to just dependencies[].{name,alias}.

Edit: whops I forgot #31 exists. This PR would solve the issue #31 is having, but #31 would need slightly looser restrictions (allowing A-Z too) to solve the problem I'm having with Authentik