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.

.vscode/launch.json

@@ -17,6 +17,10 @@
                 "10G",
                 "--disk-path",
                 "tmp/disk",
+                "--memory-gc",
+                "lfu",
+                "--disk-gc",
+                "lru",
                 "--log-level",
                 "debug",
             ],
@@ -32,6 +36,8 @@
                 "10G",
                 "--disk-path",
                 "tmp/disk",
+                "--disk-gc",
+                "hybrid",
                 "--log-level",
                 "debug",
             ],
@@ -45,6 +51,8 @@
             "args": [
                 "--memory",
                 "1G",
+                "--memory-gc",
+                "lfu",
                 "--log-level",
                 "debug",
             ],