Implement format_speak_tags from neon_utils

[NeonDaniel]

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[JarbasAl]

    def test_format_speak_tags_with_speech(self):
        valid_output = "<speak>Speak This.</speak>"
        no_tags = format_speak_tags("Speak This.")
        self.assertEqual(no_tags, valid_output)

        leading_only = format_speak_tags("<speak>Speak This.")
        self.assertEqual(leading_only, valid_output)

        leading_with_exclusion = format_speak_tags("Nope.<speak>Speak This.")
        self.assertEqual(leading_with_exclusion, valid_output)

        trailing_only = format_speak_tags("Speak This.</speak>")
        self.assertEqual(trailing_only, valid_output)

        trailing_with_exclusion = format_speak_tags("Speak This.</speak> But not this.")
        self.assertEqual(trailing_with_exclusion, valid_output)

        tagged = format_speak_tags("<speak>Speak This.</speak>")
        self.assertEqual(tagged, valid_output)

        tagged_with_exclusion = format_speak_tags("Don't<speak>Speak This.</speak>But Not this.")
        self.assertEqual(tagged_with_exclusion, valid_output)

    def test_format_speak_tags_empty(self):
        leading_closure = format_speak_tags("</speak>hello.")
        self.assertFalse(leading_closure)

        trailing_open = format_speak_tags("hello.<speak>")
        self.assertFalse(trailing_open)

    def test_format_speak_tags_with_speech_no_tags(self):
        valid_output = "Speak This."
        no_tags = format_speak_tags("Speak This.", False)
        self.assertEqual(no_tags, valid_output)

        leading_only = format_speak_tags("<speak>Speak This.", False)
        self.assertEqual(leading_only, valid_output)

        leading_with_exclusion = format_speak_tags("Nope.<speak>Speak This.", False)
        self.assertEqual(leading_with_exclusion, valid_output)

        trailing_only = format_speak_tags("Speak This.</speak>", False)
        self.assertEqual(trailing_only, valid_output)

        trailing_with_exclusion = format_speak_tags("Speak This.</speak> But not this.", False)
        self.assertEqual(trailing_with_exclusion, valid_output)

        tagged = format_speak_tags("<speak>Speak This.</speak>", False)
        self.assertEqual(tagged, valid_output)

        tagged_with_exclusion = format_speak_tags("Don't<speak>Speak This.</speak>But Not this.", False)
        self.assertEqual(tagged_with_exclusion, valid_output)