Enhance garbage collection and caching functionality

- Updated .gitignore to include all .exe files and ensure .smashignore is tracked.
- Expanded README.md with advanced configuration options for garbage collection algorithms, detailing available algorithms and use cases.
- Modified launch.json to include memory and disk garbage collection flags for better configuration.
- Refactored root.go to introduce memoryGC and diskGC flags for garbage collection algorithms.
- Implemented hash extraction and verification in steamcache.go to ensure data integrity during caching.
- Added new tests in steamcache_test.go for hash extraction and verification, ensuring correctness of caching behavior.
- Enhanced garbage collection strategies in gc.go, introducing LFU, FIFO, Largest, Smallest, and Hybrid algorithms with corresponding metrics.
- Updated caching logic to conditionally cache responses based on hash verification results.

.gitignore

@@ -1,5 +1,5 @@
 dist/
 tmp/
-__*.exe
+*.exe
 .smashed.txt
-.smashignore
+.smashignore