Initial build for psu code manager

Add initial meson build env, empty c++ files, and the systemd service.
Add README and .gitignore
Add Matt as reviewer.

Tested: Verify build is OK and the service is installed to the correct
        dir.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: I21c060d2b98e8eafd4607cfce09038189e76d22f
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..905869d
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,4 @@
+int main()
+{
+    return 0;
+}