feat: add initial experimental Twitch Eventsub support (#5837)

Co-authored-by: nerix <nerixdev@outlook.de>

lib/twitch-eventsub-ws/CMakeLists.txt

@@ -0,0 +1,35 @@
+cmake_minimum_required(VERSION 3.15)
+cmake_policy(SET CMP0087 NEW) # evaluates generator expressions in `install(CODE/SCRIPT)`
+cmake_policy(SET CMP0091 NEW) # select MSVC runtime library through `CMAKE_MSVC_RUNTIME_LIBRARY`
+include(FeatureSummary)
+
+list(APPEND CMAKE_MODULE_PATH
+    "${CMAKE_SOURCE_DIR}/cmake"
+    )
+
+project(twitch-eventsub-ws VERSION 0.1.0)
+
+# Find boost on the system
+find_package(Boost REQUIRED OPTIONAL_COMPONENTS json)
+
+# Find OpenSSL on the system
+find_package(OpenSSL REQUIRED)
+
+option(BUILD_WITH_QT6 "Build with Qt6" On)
+if (BUILD_WITH_QT6)
+    set(MAJOR_QT_VERSION "6")
+else()
+    set(MAJOR_QT_VERSION "5")
+endif()
+find_package(Qt${MAJOR_QT_VERSION} REQUIRED COMPONENTS Core)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+add_subdirectory(src)
+
+include(cmake/GenerateJson.cmake)
+
+generate_json_impls(SRC_TARGET twitch-eventsub-ws GEN_TARGET twitch-eventsub-ws-gen)
+
+feature_summary(WHAT ALL)