zmq: add initial cmake support

src/zmq/CMakeLists.txt

@@ -0,0 +1,19 @@
+# Copyright (c) 2023-present The firo Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or https://opensource.org/license/mit/.
+
+add_library(firo_zmq STATIC EXCLUDE_FROM_ALL
+  zmqabstractnotifier.cpp
+  zmqnotificationinterface.cpp
+  zmqpublishnotifier.cpp
+)
+target_compile_definitions(firo_zmq
+  INTERFACE
+    ENABLE_ZMQ=1
+)
+target_link_libraries(firo_zmq
+  PRIVATE
+    core_interface
+    univalue
+    zeromq
+)