Import source to librtti

Summary:

- Import initial source

Test Plan:
NA

meson.build

@@ -0,0 +1,18 @@
+project('librtti',
+        ['c'],
+        version: '0.0.1',
+        meson_version: '>=1.5',
+        default_options: [
+          'c_std=gnu17'])
+
+add_project_arguments(['-ggdb',
+                       '-g3',
+                       '-Wno-cpp'],
+                      language: ['c'])
+
+subdir('src')
+if get_option('with_debug') == true
+  subdir('testsuite')
+endif
+# subdir('examples')
+