meson: Switch autoconf build to meson

Summary:
- Add meson build flow.
- Remove the options not being configured from yocto as configure
  args and add them as constants/define in settings_manager.hpp

Tested:
- autotools build passes.
- meson build passes with "ninja -C build".

Change-Id: Iaa7704886cdcd5481a04bae77e02df2c6a53aee9
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..1725883
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1,6 @@
+option(
+    'settings_yaml',
+    type: 'string',
+    value: 'settings_example.yaml',
+    description: 'Path to settings yaml',
+)