chore: Bump version to v2.5.0 - Multi-Platform Feature Parity

Prepare v2.5.0 release with multi-LLM platform support.

Major changes:
- Add support for 4 platforms (Claude, Gemini, OpenAI, Markdown)
- Complete feature parity across all platforms
- 18 MCP tools with multi-platform support
- Comprehensive platform documentation

Updated files:
- pyproject.toml: version 2.4.0 → 2.5.0
- README.md: version badge updated, tests 427 → 700
- CHANGELOG.md: Added v2.5.0 release notes
- docs/CLAUDE.md: Updated version and features

Release date: 2025-12-28

README.md

@@ -2,11 +2,11 @@
 
 # Skill Seeker
 
-[![Version](https://img.shields.io/badge/version-2.4.0-blue.svg)](https://github.com/yusufkaraaslan/Skill_Seekers/releases/tag/v2.4.0)
+[![Version](https://img.shields.io/badge/version-2.5.0-blue.svg)](https://github.com/yusufkaraaslan/Skill_Seekers/releases/tag/v2.5.0)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Python 3.10+](https://img.shields.io/badge/python-3.10+-blue.svg)](https://www.python.org/downloads/)
 [![MCP Integration](https://img.shields.io/badge/MCP-Integrated-blue.svg)](https://modelcontextprotocol.io)
-[![Tested](https://img.shields.io/badge/Tests-427%20Passing-brightgreen.svg)](tests/)
+[![Tested](https://img.shields.io/badge/Tests-700%20Passing-brightgreen.svg)](tests/)
 [![Project Board](https://img.shields.io/badge/Project-Board-purple.svg)](https://github.com/users/yusufkaraaslan/projects/2)
 [![PyPI version](https://badge.fury.io/py/skill-seekers.svg)](https://pypi.org/project/skill-seekers/)
 [![PyPI - Downloads](https://img.shields.io/pypi/dm/skill-seekers.svg)](https://pypi.org/project/skill-seekers/)