fix(codex-lens): resolve installation issues from frontend

- Add missing README.md file required by setuptools
- Fix deprecated license format in pyproject.toml (use SPDX string instead of TOML table)
- Add MIT LICENSE file for proper packaging
- Verified successful local installation and import

Fixes permission denied error during npm-based installation on macOS

codex-lens/README.md

@@ -0,0 +1,59 @@
+# CodexLens
+
+CodexLens is a multi-modal code analysis platform designed to provide comprehensive code understanding and analysis capabilities.
+
+## Features
+
+- **Multi-language Support**: Analyze code in Python, JavaScript, TypeScript and more using Tree-sitter parsers
+- **Semantic Search**: Find relevant code snippets using semantic understanding with fastembed and HNSWLIB
+- **Code Parsing**: Advanced code structure parsing with tree-sitter
+- **Flexible Architecture**: Modular design for easy extension and customization
+
+## Installation
+
+### Basic Installation
+
+```bash
+pip install codex-lens
+```
+
+### With Semantic Search
+
+```bash
+pip install codex-lens[semantic]
+```
+
+### With GPU Acceleration (NVIDIA CUDA)
+
+```bash
+pip install codex-lens[semantic-gpu]
+```
+
+### With DirectML (Windows - NVIDIA/AMD/Intel)
+
+```bash
+pip install codex-lens[semantic-directml]
+```
+
+### With All Optional Features
+
+```bash
+pip install codex-lens[full]
+```
+
+## Requirements
+
+- Python >= 3.10
+- See `pyproject.toml` for detailed dependency list
+
+## Development
+
+This project uses setuptools for building and packaging.
+
+## License
+
+MIT License
+
+## Authors
+
+CodexLens Contributors