Refactor TCP Fast Open checks and update message identifiers.

Removed transport type conditions for TCP Fast Open to streamline configuration usage. Added imports for new message identifiers in `ClientPlaySessionHandler`. Cleaned up Netty library definitions in `libs.versions.toml`.

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ClientPlaySessionHandler.java

@@ -30,6 +30,8 @@ import com.velocitypowered.api.event.player.TabCompleteEvent;
 import com.velocitypowered.api.event.player.configuration.PlayerEnteredConfigurationEvent;
 import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.api.proxy.messages.ChannelIdentifier;
+import com.velocitypowered.api.proxy.messages.LegacyChannelIdentifier;
+import com.velocitypowered.api.proxy.messages.MinecraftChannelIdentifier;
 import com.velocitypowered.proxy.VelocityServer;
 import com.velocitypowered.proxy.connection.ConnectionTypes;
 import com.velocitypowered.proxy.connection.MinecraftConnection;

proxy/src/main/java/com/velocitypowered/proxy/network/ConnectionManager.java

@@ -104,7 +104,7 @@ public final class ConnectionManager {
         .childOption(ChannelOption.IP_TOS, 0x18)
         .localAddress(address);
 
-    if (transportType.supportsTcpFastOpenServer() && server.getConfiguration().useTcpFastOpen()) {
+    if (server.getConfiguration().useTcpFastOpen()) {
       bootstrap.option(ChannelOption.TCP_FASTOPEN, 3);
     }
 
@@ -197,7 +197,7 @@ public final class ConnectionManager {
             this.server.getConfiguration().getConnectTimeout())
         .group(group == null ? this.workerGroup : group)
         .resolver(this.resolver.asGroup());
-    if (transportType.supportsTcpFastOpenClient() && server.getConfiguration().useTcpFastOpen()) {
+    if (server.getConfiguration().useTcpFastOpen()) {
       bootstrap.option(ChannelOption.TCP_FASTOPEN_CONNECT, true);
     }
     return bootstrap;