Bug fixes: Handling of link markdown

[janusbal]

Description

Fixes for:

1. Link markdown format: When a link destination has parenthesis the formatting is broken. E.g:
   link renders as link with destination of https://adaptivecard.io/(aaa

How Verified

To test for markdown:
{ "$schema": "http://adaptivecards.io/schemas/adaptive-card.json", "type": "AdaptiveCard", "version": "1.0", "body": [ { "type": "TextBlock", "text": "[empty destination]()", "wrap": true }, { "type": "TextBlock", "text": "[destination with [a](x)]([https://aaa.com](https://bbb.com))", "wrap": true }, { "type": "TextBlock", "text": "[link]([https://aaa][.c[]om](https://bbb.com))", "wrap": true }, { "type": "TextBlock", "text": "[link()[][]]([https://aaa][.c[]om](*ht*tp([])s://bbb.com))", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know [aaa] m (aa)ore](https://aaa.bbb.com/(a)sites(Test).doc?somegar)bageValue*afterstar()", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more](https://aaa.bbb.com/(a)sites(Test).doc?somegarbageValue)*afterstar()", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more](https://aaa.bbb.com/(a)sit(es(Test).doc?somegarbageValue)*after_beforestar)*", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more](https://aaa.bbb.com/(a)sites(Test).doc?somegarbageValue)*afterstar()", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more](google.com)", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more](https://aaa.bbb.com/(a)sit(es(Test).doc?somegarbageValue)*afterstar)", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more]()", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know)]()betweenpars()", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more](", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more])", "wrap": true }, { "type": "TextBlock", "text": "[Stay tuned to Know more]", "wrap": true } ] }

NOTE: This change still does not support filtered markdowns. For example:
[atitle with *italic*](http://aa.com) will not render as other systems would. atitle with italic

[empty destination]()
[destination with [a](x)]([https://aaa.com](https://bbb.com))
[link]([https://aaa][.c[]om](https://bbb.com))
[link()[][]]([https://aaa][.c[]om](*ht*tp([])s://bbb.com))
[Stay tuned to Know [aaa] m (aa)ore](https://aaa.bbb.com/(a)sites(Test).doc?somegar)bageValue*afafafafafafa()
[Stay tuned to Know more](https://aaa.bbb.com/(a)sites(Test).doc?somegarbageValue)*afafafafafafa()
[Stay tuned to Know more](https://aaa.bbb.com/(a)sit(es(Test).doc?somegarbageValue)*afafafafafafa)*
[Stay tuned to Know more](https://aaa.bbb.com/(a)sites(Test).doc?somegarbageValue)*afafafafafafa()
[Stay tuned to Know more](google.com)
[Stay tuned to Know more](https://aaa.bbb.com/(a)sit(es(Test).doc?somegarbageValue)*afafafafafafa)
[Stay tuned to Know more]()
[Stay tuned to Know)]()afafafa()
[Stay tuned to Know more](
[Stay tuned to Know more])
[Stay tuned to Know more]"

Microsoft Reviewers: Open in CodeFlow

[jwoo-msft]

@janusbal
Can you separate this PR into two PRs?
I can approve two issues, but markdwon takes longer for me to parse.In that way, markdown review won't block the rest of the prs.

[janusbal]

@janusbal Can you separate this PR into two PRs? I can approve two issues, but markdwon takes longer for me to parse.In that way, markdown review won't block the rest of the prs.

@jwoo-msft we prefer to have the next sdk drop as many fixes as we can possibly include. We're fine with markdown changes going to more reviewers.

[jwoo-msft]

Thanks for fixing this.
It looks great overall with few minor issues.