refactor(run): migrate script CMake fallback to Vix Engine

[GaspardKirira]

Summary

Move generated CMake script-project planning and execution from modules/cli
into Vix Engine.

Requirements

• Generate the fallback project through the engine.
• Resolve dependencies through shared engine services.
• Configure and build through the engine.
• Return the executable as an artifact.
• Preserve SQLite, MySQL, sanitizer, and linker options.
• Preserve deterministic generated target names.

Acceptance criteria

• CLI code does not generate script CMakeLists.txt.
• Script fallback uses engine configuration.
• Script fallback uses engine build execution.
• Produced executables are returned as artifacts.
• Existing fallback behavior remains compatible.