[GH-240]:Fixed issue #240 edited the pretext of custom post

[Kshitij-Katiyar]

Summary

• Users could not edit the post's pretext message for starting a new zoom meeting due to a hardcoded message.
• This PR contains all the changes from Pr #248 So this PR alone is enough to fix this issue so we can close Pr #248 afterward.

Issue

• Fixes https://github.com/mattermost/mattermost-plugin-zoom/issues/240
• Pr #248

[mattermost-build]

Hello @Kshitij-Katiyar,

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (f50692b) 19.33% compared to head (582b298) 19.33%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #287 +/- ## ======================================= Coverage 19.33% 19.33% ======================================= Files 9 9 Lines 1479 1479 ======================================= Hits 286 286 Misses 1138 1138 Partials 55 55 ```

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[hanzei]

/update-branch

[mattermost-build]

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[Kshitij-Katiyar]

/update-branch

@hanzei synced with master

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[mattermost-build]

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[hanzei]

@AayushChaudhary0001 Can you please review this PR?

[mickmister]

To render the markdown using the webapp's markdown logic, we can use the webapp's exposed functions formatText and messageHtmlToComponent

https://github.com/mattermost/mattermost-plugin-ai/blob/6f5c45ccbf3bb262fb6710bdc6a08838ff47e5cc/webapp/src/components/post_text.tsx#L43-L47

    const text = messageHtmlToComponent(
        formatText(props.message, markdownOptions),
        true,
        messageHtmlToComponentOptions,
    );

    return (
        <div>
            {text}
        </div>
    );

[avas27JTG]

@hanzei @Kshitij-Katiyar Tested this PR, working fine for text messages, but not supporting emoji's and GiF's if added in the message

@AayushChaudhary0001 this has been fixed.

[hanzei]

@Kshitij-Katiyar Please merge master into your PR