Implement command to retrieve firmware version

Currently, it only supports retrieving BMC/BIOS versions

Change-Id: I58bce16c491f18d27d3989e47814365de091954b
Signed-off-by: John Wang <wangzhiqiang02@ieisystem.com>
diff --git a/src/meson.build b/src/meson.build
index 65ecd02..260c160 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -8,6 +8,7 @@
 
 sources = [
   'asset_info.cpp',
+  'firmware_version.cpp',
   'utils.cpp',
 ]