Support javadocs in the Enigma format

[natanfudge]

Looking at EnigmaImpl, Matcher would throw when it encounters a JAVADOC (COMMENT, as liach is now saying) line, which Enigma would output following FabricMC/Enigma#185. It needs to parse and write it properly.

[natanfudge]

Here's an example mapping file for testing (it is very reminiscent of V2)

CLASS net/minecraft/class_744 net/minecraft/client/input/Input
    COMMENT This is a class javadoc
    FIELD field_3903 sneaking Z
    FIELD field_3904 jumping Z
    FIELD field_3905 movementForward F
    FIELD field_3906 pressingRight Z
    FIELD field_3907 movementSideways F
        COMMENT This is a field javadoc
    FIELD field_3908 pressingLeft Z
    FIELD field_3909 pressingBack Z
    FIELD field_3910 pressingForward Z
    METHOD method_20622 hasForwardMovement ()Z
    METHOD method_3128 getMovementInput ()Lnet/minecraft/class_241;
    METHOD method_3129 tick (Z)V
        COMMENT This is a method javadoc
        ARG 1 boolean_1
            COMMENT This is a parameter javadoc

[sfPlayer1]

This should be fully implemented now