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/README b/README
new file mode 100644
index 0000000..14ace83
--- /dev/null
+++ b/README
@@ -0,0 +1,15 @@
+# phosphor-psu-code-mgmt
+
+phosphor-psu-code-mgmt is a service to provide management for PSU code,
+including:
+
+* PSU code version
+* PSU code update
+
+
+## Building
+
+```
+meson build/ && ninja -C build
+```
+