[Docs] v2.0 Documentation Update

[Siddhant-K-code]

Summary

Comprehensive documentation for all v2.0 features.

Motivation

New features need clear documentation for adoption. Good docs reduce support burden and improve developer experience.

Sections to Add/Update

• Compression Guide - How semantic compression works, configuration options
• Summarization Guide - Hierarchical summarization, importance scoring
• Cache Configuration - Memory vs Redis, TTL settings, sizing
• Pipeline Usage - End-to-end examples, best practices
• Migration from v1 - Breaking changes, upgrade path
• Performance Tuning - Benchmarks, optimization tips
• API Reference - OpenAPI spec for new endpoints

Documentation Structure

docs/
├── getting-started.md
├── guides/
│   ├── compression.md
│   ├── summarization.md
│   ├── caching.md
│   └── pipeline.md
├── reference/
│   ├── api.md
│   ├── cli.md
│   └── configuration.md
├── migration/
│   └── v1-to-v2.md
└── examples/
    ├── langchain.md
    ├── llamaindex.md
    └── mcp.md

Acceptance Criteria

• All new features documented
• Code examples for each feature
• Migration guide complete
• README updated with v2 highlights