refactor(macros): added macros class

macros provides a unified place to define macros which can be accessed at other points in the code. I defined a DEPRICATION_WARNING_OFF macro so we can disable those warnings for times when we cannot control them

src/poly/utils/meson.build

@@ -12,7 +12,7 @@ libpolyutils = static_library('polyutils',
   polyutils_sources,
   include_directories : include_directories('./public'),
   cpp_args: ['-fvisibility=default'],
-  dependencies: [mfem_dep],
+  dependencies: [mfem_dep, warning_control_dep],
   install: true
 )
 
@@ -20,5 +20,5 @@ polyutils_dep = declare_dependency(
   include_directories : include_directories('./public'),
   link_with : libpolyutils,
   sources : polyutils_sources,
-  dependencies : [mfem_dep]
+  dependencies : [mfem_dep, warning_control_dep]
 )