cmake: Add mediafoundation plugin to OBS windows build

This commit updates the CMakeLists.txt file in the plugins directory to
incorporate the mediafoundation plugin into OBS build system. This
ensures that Media Foundation-based encoding is available for Windows
on ARM (WoA) devices, utilizing Qualcomm hardware for efficient video
Encoding.

Author: thirumalai-qcom

plugins/CMakeLists.txt

@@ -87,4 +87,5 @@ add_obs_plugin(text-freetype2)
 add_obs_plugin(vlc-video WITH_MESSAGE)
 add_obs_plugin(win-capture PLATFORMS WINDOWS)
 add_obs_plugin(win-dshow PLATFORMS WINDOWS)
+add_obs_plugin(mediafoundation PLATFORMS WINDOWS)
 add_obs_plugin(win-wasapi PLATFORMS WINDOWS)