Lightweight template engine

[niteshpurohit]

Type: Task
Parent Issue: #427

Summary

Simple string template engine with variable interpolation, conditionals, and loops (ERB-lite alternative)

Scope

Simple string template engine with variable interpolation, conditionals, and loops (ERB-lite alternative)

Not In Scope

• Full ERB compatibility
• Template inheritance

Acceptance Criteria

• Template supports variable interpolation
• Conditional support (if/unless)
• Loop support (each)
• Tests verify template rendering
• Documentation with syntax guide

C++ Native Library: No