Implement support for renaming collections

[aosasona]

• Implement RenameCollection on collections handler
• Add collections rename command
• Update Error method on validation error type

[Copilot]

Pull Request Overview

This PR implements support for renaming collections by adding a new rename operation to the collections handler and CLI command. The changes also improve the validation error messaging for better clarity.

Key Changes:

• Added RenameCollection handler method with ULID validation and error handling
• Added collections rename CLI command with proper argument validation
• Enhanced validation error message formatting and clarity

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
pkg/validation/error.go	Updated validation error formatting and improved collection name requirement message
cmd/bore-cli/app/handler/collections.go	Implemented RenameCollection handler with ULID parsing and validation
cmd/bore-cli/app/commands.go	Added rename subcommand to collections command

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

These empty string checks are redundant since lines 102-106 already validate that exactly 2 arguments are provided via c.NArg(). The c.Args().Get() calls will never return empty strings when the argument count validation passes.

Suggested change

	if collectionID == "" {
	return cli.Exit("collection id is required", 1)
	} else if newName == "" {
	return cli.Exit("new name is required", 1)
	}
	// Redundant empty string checks removed; argument count validation above suffices.

[aosasona]

Wrap both checks with strings.TrimSpace instead?