feat: Improve Performance of delete Command with Concurrency

[OmBiradar]

Fixes: #79
Also trying to fix #316

Inspired from #80

Handles concurrent deletion of projects, registries and repositories

Description

This PR enhances the performance of the harbor project delete command by introducing concurrency to handle multiple project deletions in parallel. The changes ensure that the command is more efficient, especially when dealing with multiple projects.

Changes

Changes made in RepoDeleteCmd(), DeleteRegistryCommand() and DeleteProjectCommand() to handle batch operation by using go routines.

Benefits

Performance: Can concurently handle delete operations, thus improving execution time when dealing with multiple projects.
Readibility: Logging of any errors and overall status delivers a clear insight into errors and issues.

Usage

# Delete multiple projects concurrently
harbor project delete project1 project2 project3

# Delete multiple repositories concurrently
harbor repository delete repo1 repo2 repo3

# Delete multiple registries concurrently
harbor registry delete reg1 reg2 reg3

Looking forward for integration into the main branch. Waiting for your comments maintainers and contributors.