Enhance documentation and roadmap for ASLCD Toolkit

- Updated index.md to reflect the new vision and features of Spec Kit Spark, emphasizing AI-driven lifecycle management and adaptive workflows.
- Revised README.md to introduce the ASLCD vision and improve clarity on project goals and features.
- Created adaptive-lifecycle.md to provide a comprehensive overview of the Adaptive System Life Cycle Development approach, including problem statements, design principles, and command references.
- Established roadmap.md detailing current implementations, near-term and medium-term goals, and long-term vision for the Spec Kit Spark project.

Author: markhazleton