storm new: project scaffolder for the three language/framework combinations

[zantvoort]

Carved out of #213. The example apps are now GitHub template repositories (#213, "Use this template"); this issue tracks the CLI scaffolder half.

Teach @storm-orm/cli a new command: npx @storm-orm/cli new (aka storm new) prompts for language and framework (Spring Boot with Java, Spring Boot with Kotlin, or Ktor with Kotlin) plus database, and produces a runnable project preconfigured with H2 so it starts with no external database.

Now that the storm-example-* repos are GitHub templates, the scaffolder can generate from them directly (GitHub template generation) or vendor their layout, substituting project name, package, and database driver.

Tasks

• storm new command with interactive prompts (language, framework, database)
• Emit a runnable, H2-preconfigured project for each of the three combinations
• Keep the generated versions in sync with releases