Adding CPUCore interface support

This commit introduces essential D-Bus infrastructure support for
hosting the `Item.CPUCore` D-Bus object. Additionally, it includes
getter and setter functions to enable get/set properties within the
`CPUCore` interface, such as core count and microcode.

Testing:
Unit test passed

Change-Id: I728522b34e96ee7d6609efb5746b40cf923812e8
Signed-off-by: Kamalkumar Patel <kamalkumar.patel@ibm.com>
diff --git a/libpldmresponder/meson.build b/libpldmresponder/meson.build
index ce05dce..63cbaa7 100644
--- a/libpldmresponder/meson.build
+++ b/libpldmresponder/meson.build
@@ -29,6 +29,7 @@
   '../host-bmc/dbus_to_host_effecters.cpp',
   '../host-bmc/host_condition.cpp',
   '../host-bmc/dbus/custom_dbus.cpp',
+  '../host-bmc/dbus/cpu_core.cpp',
   '../host-bmc/utils.cpp',
   'event_parser.cpp'
 ]