add tokenizer states for text handling; create new token files for quotes and text

resources/test/example_1.sil

@@ -5,8 +5,8 @@
 	(main []
 		(std<Image> [alt="hoge" ref="./upload/hoge.jpg"])
 		(section [lang=md ] |\
-      # Hello, world!\
+			# Hello, world!\
-      This is a simple example of SIL.\
+			This is a simple example of SIL.\
 		|)
 	)
 	(footer []

src/om/tokenizer.rs

@@ -212,6 +212,10 @@ impl Iterator for Tokenizer {
                         }
                     }
                 },
+                State::InText => match c {
+                    '"' => todo!(),
+                    _ => todo!(),
+                },
                 State::InQuote => match c {
                     '"' => todo!(),
                     _ => todo!(),
@@ -232,6 +236,7 @@ enum State {
     Behavior,
     BehaviorSeparator,
 
+    InText,
     InQuote,
     InDoubleQuote,
 }