Refactor Python and Zig strategies for improved symbol management and dependency tracking

- Removed the backup Python strategy file to streamline codebase.
- Enhanced Zig strategy to register dependencies with the symbol manager, classify imports, and improve logging of dependency counts.
- Updated SCIP symbol analyzer to classify Zig imports as standard library, third party, or local based on module names.
- Added methods to extract and classify symbol names and dependencies in Zig strategy.

Author: johnhuang316