refactor(gameplay): split world into client and server

Remove monolithic World, Player, Chunk classes. Introduce ClientWorld, ServerWorld, ClientPlayer, and related networked components. Add Abseil dependency for logging and checks. Rename old files to pre_remove_* and update all includes and references accordingly.

src/gameplay/client_world.cpp

@@ -1,5 +1,6 @@
 #include "Cubed/gameplay/client_world.hpp"
 
+#include "Cubed/config.hpp"
 #include "Cubed/gameplay/game_time.hpp"
 #include "Cubed/gameplay/packet.hpp"
 using namespace std::chrono;
@@ -13,9 +14,7 @@ struct ChunkRenderData {
 };
 } // namespace
 
-ClientWorld::ClientWorld(std::string_view player_name,
-                         std::shared_ptr<NetworkClient> client)
-    : m_player(*this, player_name), m_client(client) {}
+ClientWorld::ClientWorld() : m_player(*this) {}
 
 ClientWorld::~ClientWorld() {
     stop_client_thread();
@@ -186,9 +185,11 @@ void ClientWorld::receive_block_change(const BlockChangeRsp& rsp) {
     set_block(pos, rsp.block());
 }
 
-void ClientWorld::init() {
+void ClientWorld::init(std::string_view player_name,
+                       std::shared_ptr<NetworkClient> client) {
     m_chunks.reserve(MAX_DISTANCE * MAX_DISTANCE * 4);
-
+    m_player.init(player_name);
+    m_client = client;
     // timer
     register_timer("player_pos", 2, [this]() { report_player_pos(); });
 
@@ -219,6 +220,12 @@ void ClientWorld::stop_client_thread() {
     m_game_running = false;
 }
 
+void ClientWorld::hot_reload() {
+    auto& config = Config::get();
+    int dist = config.get<int>("world.rendering_distance");
+    m_rendering_distance = dist <= MAX_DISTANCE ? dist : MAX_DISTANCE;
+}
+
 void ClientWorld::client_run(std::stop_token stoken) {
     Logger::info("Client Thread Started");
     while (!stoken.stop_requested()) {