feat: Update gRPC configuration for Windows and remove unused submodule

- Added a new `grpc_windows.cmake` file for optimized gRPC builds on Windows using vcpkg, including checks for required targets and fallbacks.
- Updated `grpc.cmake` to include the new Windows-specific configuration and streamline the build process.
- Removed the `abseil-cpp` submodule from `.gitmodules` as it is no longer needed.

.gitmodules

@@ -4,9 +4,6 @@
 [submodule "assets/asm/alttp-hacker-workspace"]
 	path = assets/asm/alttp-hacker-workspace
 	url = https://github.com/scawful/alttp-hacker-workspace.git
-[submodule "src/lib/abseil-cpp"]
-	path = src/lib/abseil-cpp
-	url = https://github.com/abseil/abseil-cpp.git
 [submodule "src/lib/SDL"]
 	path = src/lib/SDL
 	url = https://github.com/libsdl-org/SDL.git

cmake/grpc.cmake

@@ -5,15 +5,23 @@ set(CMAKE_POLICY_DEFAULT_CMP0074 NEW)
 # Include FetchContent module
 include(FetchContent)
 
+# Try Windows-optimized path first
+if(WIN32)
+  include(${CMAKE_CURRENT_LIST_DIR}/grpc_windows.cmake)
+  if(YAZE_GRPC_CONFIGURED)
+    return()
+  endif()
+endif()
+
 # Set minimum CMake version for subprojects (fixes c-ares compatibility)
 set(CMAKE_POLICY_VERSION_MINIMUM 3.5)
 
 set(FETCHCONTENT_QUIET OFF)
 
-# CRITICAL: Prevent CMake from finding system-installed protobuf/abseil
+# CRITICAL: Prevent CMake from finding system-installed protobuf
 # This ensures gRPC uses its own bundled versions
+# NOTE: We allow gRPC to use our FetchContent abseil to keep versions in sync
 set(CMAKE_DISABLE_FIND_PACKAGE_Protobuf TRUE)
-set(CMAKE_DISABLE_FIND_PACKAGE_absl TRUE)
 set(CMAKE_DISABLE_FIND_PACKAGE_gRPC TRUE)
 
 # Also prevent pkg-config from finding system packages

cmake/grpc_windows.cmake

@@ -0,0 +1,63 @@
+# Windows-optimized gRPC configuration using vcpkg
+# This file provides fast gRPC builds on Windows using pre-compiled packages
+
+cmake_minimum_required(VERSION 3.16)
+
+# Option to use vcpkg for gRPC on Windows
+option(YAZE_USE_VCPKG_GRPC "Use vcpkg pre-compiled gRPC packages (Windows only)" ON)
+
+if(WIN32 AND YAZE_USE_VCPKG_GRPC)
+  message(STATUS "Attempting to use vcpkg gRPC packages for faster Windows builds...")
+  
+  # Try to find gRPC via vcpkg
+  find_package(gRPC CONFIG QUIET)
+  find_package(Protobuf CONFIG QUIET)
+  
+  if(gRPC_FOUND AND Protobuf_FOUND)
+    message(STATUS "✓ Using vcpkg gRPC packages (fast build path)")
+    
+    # Verify required targets exist
+    if(NOT TARGET grpc++)
+      message(FATAL_ERROR "gRPC found but grpc++ target missing")
+    endif()
+    
+    if(NOT TARGET protoc)
+      # Create protoc target if it doesn't exist
+      get_target_property(PROTOC_LOCATION protobuf::protoc LOCATION)
+      if(PROTOC_LOCATION)
+        add_executable(protoc IMPORTED)
+        set_target_properties(protoc PROPERTIES IMPORTED_LOCATION "${PROTOC_LOCATION}")
+      else()
+        message(FATAL_ERROR "protoc executable not found in vcpkg gRPC package")
+      endif()
+    endif()
+    
+    if(NOT TARGET grpc_cpp_plugin)
+      # Find grpc_cpp_plugin
+      find_program(GRPC_CPP_PLUGIN grpc_cpp_plugin)
+      if(GRPC_CPP_PLUGIN)
+        add_executable(grpc_cpp_plugin IMPORTED)
+        set_target_properties(grpc_cpp_plugin PROPERTIES IMPORTED_LOCATION "${GRPC_CPP_PLUGIN}")
+      else()
+        message(FATAL_ERROR "grpc_cpp_plugin not found in vcpkg gRPC package")
+      endif()
+    endif()
+    
+    # Set variables for compatibility with rest of build system
+    set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE $<TARGET_FILE:protoc>)
+    set(_gRPC_CPP_PLUGIN $<TARGET_FILE:grpc_cpp_plugin>)
+    set(_gRPC_PROTO_GENS_DIR ${CMAKE_BINARY_DIR}/gens)
+    file(MAKE_DIRECTORY ${_gRPC_PROTO_GENS_DIR})
+    
+    # Skip the FetchContent path
+    set(YAZE_GRPC_CONFIGURED TRUE PARENT_SCOPE)
+    return()
+  else()
+    message(WARNING "vcpkg gRPC not found. Install with: vcpkg install grpc:x64-windows")
+    message(STATUS "Falling back to FetchContent build (this will be slow on first build)")
+  endif()
+endif()
+
+# If we reach here, vcpkg wasn't used - fall back to standard grpc.cmake
+message(STATUS "Using FetchContent for gRPC (standard path)")
+set(YAZE_GRPC_CONFIGURED FALSE PARENT_SCOPE)