Problem

There are not enough working, tested examples to demonstrate that the language actually works across its feature surface. 'Working' must be proven, not assumed.

Acceptance Criteria

• 20+ .nl example files in examples/
• Each covers a distinct language feature (types, functions, @use, @main, conditionals, loops, etc.)
• All examples compile and run without error via nlsc run
• CI runs all examples as a regression suite
• Examples are referenced in documentation

Why This Blocks v0.1

Without concrete working examples, there's no evidence the language works end-to-end.