Some refactors (see description)

- Renamed macro gen_time to GEN_TIME
- Moved scanner and editor to their own headers, I'm going to consider them extensions.
- I'm preparing to setup the library to build on multiple compiler platforms: clang, gcc, msvc.

.vscode/c_cpp_properties.json

@@ -9,7 +9,7 @@
                 "_DEBUG",
                 "UNICODE",
                 "_UNICODE",
-                "gen_time"
+                "GEN_TIME"
             ],
             "windowsSdkVersion": "10.0.19041.0",
             "compilerPath": "C:/Users/Ed/scoop/apps/llvm/current/bin/clang++.exe",

.vscode/settings.json

@@ -25,4 +25,4 @@
 	"C_Cpp.errorSquiggles": "enabled",
 	"godot_tools.scene_file_config": "",
 	"C_Cpp.default.compilerPath": "cl.exe"
-}
+}