feat: add unidirectional enum conversion functions

- Add generateEnumToIntFunctions for string to number conversions
- Add generateEnumToStringFunctions for number to string conversions
- Add configuration options for unidirectional generation
- Update store to support both bidirectional and unidirectional modes
- Add comprehensive tests for new functionality
- Update documentation to cover all three generation modes

Benefits:
- Cleaner, more precise TypeScript types
- Better IDE support and IntelliSense
- Smaller bundle sizes with tree-shaking
- Slightly better performance for single-direction conversions

Author: pyramation

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+    "workbench.colorTheme": "Default Dark Modern",
+    "workbench.startupEditor": "none"
+}