Add Click-based CLI with memory management commands

Add cloud provider support via LiteLLM backend

feat(cli): add IntelligentContext CLI arguments

feat: add streaming memory tool support with credential error handling

fix: correct cost calculation for cache tokens and simplify memory DevEx

fix: resolve mypy type errors across codebase

Add hierarchical memory system with graph + vector storage

Enable LLMLingua and code-aware compression by default in proxy

Fix all mypy type errors and flaky embedding test

Fix all ruff lint and format errors for CI

Prepare for OSS release v0.2.0