Rich Text cannot be parsed correctly

[hamberluo]

current format only support space

"agreement(rich)": "you have read and agreed {{term(Terms of Service)}} and {{privacy(Privacy Policy)}}.",

param don't support

1. {{term(Terms-of-Service)}}
2. {{term(Terms of Service >)}}

another problem result is camel case, but i need retain original text

		term('TermsOfService'),
		const TextSpan(text: ' and '),
		privacy('PrivacyPolicy'),