feat(macos): build a signed .app bundle in a .dmg (#4759)

cmake/dependencies/common.cmake

@@ -1,6 +1,10 @@
 # load common dependencies
 # this file will also load platform specific dependencies
 
+# Resolve OpenSSL before subprojects run their own find_package(OpenSSL) calls.
+# This ensures a user-provided OPENSSL_ROOT_DIR is honored consistently.
+find_package(OpenSSL REQUIRED)
+
 # boost, this should be before Simple-Web-Server as it also depends on boost
 include(dependencies/Boost_Sunshine)
 
@@ -17,7 +21,6 @@ add_subdirectory("${CMAKE_SOURCE_DIR}/third-party/libdisplaydevice")
 
 # common dependencies
 include("${CMAKE_MODULE_PATH}/dependencies/nlohmann_json.cmake")
-find_package(OpenSSL REQUIRED)
 find_package(PkgConfig REQUIRED)
 find_package(Threads REQUIRED)
 pkg_check_modules(CURL REQUIRED libcurl)
@@ -29,6 +32,9 @@ include_directories(SYSTEM ${MINIUPNP_INCLUDE_DIRS})
 # ffmpeg pre-compiled binaries
 include("${CMAKE_MODULE_PATH}/dependencies/ffmpeg.cmake")
 
+# Opus
+include("${CMAKE_MODULE_PATH}/dependencies/FindOpus.cmake")
+
 # platform specific dependencies
 if(WIN32)
     include("${CMAKE_MODULE_PATH}/dependencies/windows.cmake")