added discord rpc (#1178)

* added discord rpc

* linting issues

* Revert "linting issues"

This reverts commit 55f4e39506.

* fix clang-format issues

* removed wrong rpc submodule

* added correct rpc submodule

* Moved cmake instructions to correct files.

* added minor suggestions from pr

* Added an option to enable/disable RPC, added rpc to emulator.cpp making it work on nonqt builds

* typo & minor stuff

* Changed getInstance implementation with Singleton class.

* Update discord_rpc_handler.cpp

discord id

* fixed ci clangformat errors

---------

Co-authored-by: georgemoralis <giorgosmrls@gmail.com>

CMakeLists.txt

@@ -374,6 +374,8 @@ set(COMMON src/common/logging/backend.cpp
            src/common/debug.h
            src/common/decoder.cpp
            src/common/decoder.h
+           src/common/discord_rpc_handler.cpp
+           src/common/discord_rpc_handler.h
            src/common/elf_info.h
            src/common/endian.h
            src/common/enum.h
@@ -857,4 +859,7 @@ if (UNIX AND NOT APPLE)
         find_package(OpenSSL REQUIRED)
         target_link_libraries(shadps4 PRIVATE ${OPENSSL_LIBRARIES})
     endif()
-endif()
+endif()
+
+# Discord RPC
+target_link_libraries(shadps4 PRIVATE discord-rpc)