Fixing multiple bugs

- Fixes /antivpn alerts error caused by VpnStrings not being initialized. All of that initialized is now done globally inside AntiVPN class instead of individually per platform.
- Fixed bug where MySQL will only load H2.
- H2 is now a separate object and will not create an sql error on startup from the index creation process.

Common/src/main/java/dev/brighten/antivpn/database/sql/MySqlVPN.java

@@ -242,9 +242,7 @@ public class MySqlVPN implements VPNDatabase {
         if (!AntiVPN.getInstance().getVpnConfig().isDatabaseEnabled())
             return;
         AntiVPN.getInstance().getExecutor().log("Initializing MySQL...");
-        if(AntiVPN.getInstance().getVpnConfig().getDatabaseType().contains("sql")) {
-            MySQL.init();
-        } else MySQL.initH2();
+        MySQL.init();
 
         AntiVPN.getInstance().getExecutor().log("Creating tables...");