feat(patcher): Implement DualAuth patcher with enhanced server patching

- Introduce DualAuthPatcher with support for hybrid authentication
- Update default auth domain to `auth.sanasol.ws`
- Integrate Java detection and bundled JRE handling for patcher execution
- Add server patch flag for avoiding redundant patching
- Automate DualAuthPatcher setup: download, compile, and execute with dependencies
- Enhance patching logic for extended logging and modularity

.gitignore

@@ -12,3 +12,6 @@ pkg/
 *.zst
 bun.lockb
 .env
+
+# Downloaded patcher (from hytale-auth-server)
+backend/patcher/