feat: add individual commands for phases

[chewong]

Signed-off-by: GitHub noreply@github.com

Reason for Change:

Follow up for #213. Adding individual commands for phases:

./bin/azwi sa create phase --help                                                                      
The "phase" command invokes a single phase of the create workflow

Usage:
  azwi serviceaccount create phase [command]

Available Commands:
  aad-application    Create Azure Active Directory (AAD) application and its underlying service principal
  federated-identity Create federated identity between the AAD application and the Kubernetes service account
  role-assignment    Create role assignment between the AAD application and the Azure cloud resource
  service-account    Create Kubernetes service account in the current KUBECONFIG context and add azure-workload-identity labels and annotations to it

Flags:
  -h, --help   help for phase

Global Flags:
      --auth-method string        auth method to use. Supported values: cli, client_secret, client_certificate (default "cli")
      --azure-env string          the target Azure cloud (default "AzurePublicCloud")
      --certificate-path string   path to client certificate (used with --auth-method=client_certificate)
      --client-id string          client id (used with --auth-method=[client_secret|client_certificate])
      --client-secret string      client secret (used with --auth-method=client_secret)
      --debug                     Enable debug logging
      --private-key-path string   path to private key (used with --auth-method=client_certificate)
  -s, --subscription-id string    azure subscription id (required)

Use "azwi serviceaccount create phase [command] --help" for more information about a command.

./bin/azwi sa delete phase --help
The "phase" command invokes a single phase of the delete workflow

Usage:
  azwi serviceaccount delete phase [command]

Available Commands:
  aad-application    Delete the Azure Active Directory (AAD) application and its underlying service principal
  federated-identity Delete federated identity for the AAD application and the Kubernetes service account
  role-assignment    Delete the role assignment between the AAD application and the Azure cloud resource
  service-account    Delete the Kubernetes service account in the current KUBECONFIG context

Flags:
  -h, --help   help for phase

Global Flags:
      --auth-method string        auth method to use. Supported values: cli, client_secret, client_certificate (default "cli")
      --azure-env string          the target Azure cloud (default "AzurePublicCloud")
      --certificate-path string   path to client certificate (used with --auth-method=client_certificate)
      --client-id string          client id (used with --auth-method=[client_secret|client_certificate])
      --client-secret string      client secret (used with --auth-method=client_secret)
      --debug                     Enable debug logging
      --private-key-path string   path to private key (used with --auth-method=client_certificate)
  -s, --subscription-id string    azure subscription id (required)

Use "azwi serviceaccount delete phase [command] --help" for more information about a command.

Requirements

• squashed commits
• included documentation
• added unit tests and e2e tests (if applicable).

Issue Fixed:

Please answer the following questions with yes/no:

Does this change contain code from or inspired by another project? If so, did you notify the maintainers and provide attribution?

• yes
• no

Notes for Reviewers: