Added support for various nlTokTypes and added multiple demos

lang/NOTES

@@ -0,0 +1,3 @@
+Todo:
+- [ ] Not currently sure how the lexer will interpret non-latin characters (make sure it handles all unicode)
+- [ ] The lexer currently only handles a limited number of escape codes / whitespace characters

lang/demo/loop-space.no

@@ -0,0 +1,2 @@
+loop:
+    print("Goodbye world!")

lang/demo/loop-tab-crlf.no

@@ -0,0 +1,2 @@
+loop:
+	print("Goodbye world!")

lang/demo/loop-tab.no

@@ -0,0 +1,2 @@
+loop:
+	print("Goodbye world!")

lang/demo/string.no

@@ -0,0 +1,3 @@
+"Goodbye World!"
+'a' 
+'abc' # ERROR