[create-content-sdk-app] Add help flag output

[aeroplaniko-sitecore]

• This PR follows the Contribution Guide
• Changelog updated
• Upgrade guide entry added

Description / Motivation

Fixes JSS-9643.

The create-content-sdk-app initializer now handles --help and -h before entering template selection or interactive prompts, displaying usage information and exiting the command flow.

Testing Details

• Unit Test Added
• Manual Test/Other (Please elaborate)

Ran:

• yarn test in packages/create-content-sdk-app
• yarn lint in packages/create-content-sdk-app

Note: lint completed with one existing warning in src/common/processes/transform.ts.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 30aef1e

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[github-actions]

📦 Package Size and Test Coverage Report

Package	Base Size	PR Size	Δ Change	Base Coverage	PR Coverage	Δ Change
analytics-core	67.34 KB	67.34 KB	✅ 0.00 KB	97.40%	97.40%	0.00%
cli	59.14 KB	59.14 KB	✅ 0.00 KB	70.09%	70.09%	0.00%
content	429.03 KB	429.03 KB	✅ 0.00 KB	92.38%	92.38%	0.00%
core	120.61 KB	120.61 KB	✅ 0.00 KB	91.27%	91.27%	0.00%
create-content-sdk-app	542.41 KB	543.13 KB	🔺 +0.72 KB	96.35%	96.43%	+0.08%
events	72.27 KB	72.27 KB	✅ 0.00 KB	97.97%	97.97%	0.00%
nextjs	568.35 KB	568.35 KB	✅ 0.00 KB	90.97%	90.97%	0.00%
personalize	64.01 KB	64.01 KB	✅ 0.00 KB	99.74%	99.74%	0.00%
react	230.78 KB	230.78 KB	✅ 0.00 KB	93.80%	93.80%	0.00%
search	8.10 KB	8.10 KB	✅ 0.00 KB	98.57%	98.57%	0.00%
Total	—	—	🔺 +0.72 KB	—	—	—

[illiakovalenko]

Looks good 👍
A couple of minor suggestions below
Also, please, add a changeset, can be a "patch" version

[illiakovalenko]

We have a getAllTemplates() function, and it's used in main(), it returns the dynamic list of templates. Currently, when a new template is added, printHelp will silently fall out of sync.
Could you, please, accept here a list of templates and show them?

[illiakovalenko]

A minor suggestion to add some styling

Suggested change

	console.log(`Usage:
	create-content-sdk-app [template] [options]
	Templates:
	nextjs
	nextjs-app-router
	Options:
	--template <name> Template to scaffold
	--destination <path> Destination folder
	--yes Use defaults and skip prompts where possible
	--force Continue if destination is not empty
	--noInstall Skip package install and lint fix
	--silent Suppress normal output
	--help, -h Show help`);
	};
	console.log(`${chalk.bold('Usage:')} create-content-sdk-app ${chalk.cyan('[template]')} ${chalk.yellow('[options]')}
	${chalk.bold('Arguments:')}
	${chalk.cyan('template')} Template to scaffold (e.g. nextjs, nextjs-app-router)
	Templates: <--TODO - Show a dynamic list of templates -->
	nextjs
	nextjs-app-router
	${chalk.bold('Options:')}
	${chalk.yellow('--template')} ${chalk.dim('<name>')} Template to scaffold
	${chalk.yellow('--destination')} ${chalk.dim('<path>')} Destination folder
	${chalk.yellow('--yes')} Use defaults and skip prompts where possible
	${chalk.yellow('--force')} Continue if destination is not empty
	${chalk.yellow('--noInstall')} Skip package install and lint fix
	${chalk.yellow('--silent')} Suppress normal output
	${chalk.yellow('-h, --help')} Show help`);
	};