Add support for Qt5

cmake/FindQt5.cmake

@@ -0,0 +1,36 @@
+# Documentation: https://cmake.org/cmake/help/latest/manual/cmake-developer.7.html#find-modules
+
+# Always try config mode for the requested components (handles repeated calls)
+find_package(Qt5 COMPONENTS ${Qt5_FIND_COMPONENTS} QUIET CONFIG)
+
+if(Qt5_FOUND)
+    if(NOT Qt5_FIND_QUIETLY)
+        message(STATUS "Qt5 found: ${Qt5_DIR}")
+    endif()
+    return()
+endif()
+
+if(Qt5_FIND_REQUIRED AND WIN32)
+    message(STATUS "Downloading Qt5...")
+    # Fix warnings about DOWNLOAD_EXTRACT_TIMESTAMP
+    if(POLICY CMP0135)
+        cmake_policy(SET CMP0135 NEW)
+    endif()
+    include(FetchContent)
+    set(FETCHCONTENT_QUIET OFF)
+    if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+        FetchContent_Declare(Qt5
+            URL "https://github.com/x64dbg/deps/releases/download/2025.07.02/qt5.12.12-msvc2017_64.7z"
+            URL_HASH SHA256=770490bf09514982c8192ebde9a1fac8821108ba42b021f167bac54e85ada48a
+        )
+    else()
+        FetchContent_Declare(Qt5
+            URL "https://github.com/x64dbg/deps/releases/download/2025.07.02/qt5.12.12-msvc2017.7z"
+            URL_HASH SHA256=3ff2a58e5ed772be475643cd7bb2df3e5499d7169d794ddf1ed5df5c5e862cb6
+        )
+    endif()
+    FetchContent_MakeAvailable(Qt5)
+    unset(FETCHCONTENT_QUIET)
+    set(Qt5_ROOT ${qt5_SOURCE_DIR})
+    find_package(Qt5 COMPONENTS ${Qt5_FIND_COMPONENTS} CONFIG REQUIRED)
+endif()