feat: complete redesign to v2.4.0 - Claude's ultimate development partner

Major redesign of Gemini MCP Server with modular architecture:

- Removed all emoji characters from tool outputs for clean terminal display
- Kept review category emojis (🔴🟠🟡🟢) per user preference
- Added 4 specialized tools:
  - think_deeper: Extended reasoning and problem-solving (temp 0.7)
  - review_code: Professional code review with severity levels (temp 0.2)
  - debug_issue: Root cause analysis and debugging (temp 0.2)
  - analyze: General-purpose file analysis (temp 0.2)
- Modular architecture with base tool class and Pydantic models
- Verbose tool descriptions with natural language triggers
- Updated README with comprehensive examples and real-world use cases
- All 25 tests passing, type checking clean, critical linting clean

BREAKING CHANGE: Removed analyze_code tool in favor of specialized tools

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

tools/__init__.py

@@ -0,0 +1,15 @@
+"""
+Tool implementations for Gemini MCP Server
+"""
+
+from .think_deeper import ThinkDeeperTool
+from .review_code import ReviewCodeTool
+from .debug_issue import DebugIssueTool
+from .analyze import AnalyzeTool
+
+__all__ = [
+    "ThinkDeeperTool",
+    "ReviewCodeTool",
+    "DebugIssueTool",
+    "AnalyzeTool",
+]