Skill delivery via create-smelter-app

[JBRS307]

This is just one method. One more thing to do is to add info on how to acquire the skill with npx skills when smelter is added to the project with npm add.

The skill is taken from smelter-labs/skills, so the package we can easily change it without updating the package on npm.

[Copilot]

Pull request overview

Adds an optional post-scaffold step to create-smelter-app to offer installing a “Smelter” skill (sourced from smelter-labs/skills) via npx skills, so users can set up their AI coding assistant integration immediately after project creation.

Changes:

• Invoke a new post-create prompt (promptInstallSkill) after the project is generated.
• Add installSkill.ts, which prompts the user and runs npx skills add smelter-labs/skills --skill live-composing-smelter on confirmation.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
ts/create-smelter-app/src/run.ts	Calls the new skill-install prompt after successful project creation.
ts/create-smelter-app/src/installSkill.ts	Implements the confirmation prompt and runs the npx skills add ... install flow with a fallback message on failure.

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