[BUG] plain text with colon causes parsing error

[johnxu16]

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• [x] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• [x] I have read the documentation and cannot find an answer.

Describe the bug colon has to be escaped

Ex. ❌ "foo:bar" ✅ "foo\:bar"

Reproduction Start from https://codesandbox.io/p/sandbox/mdx-editor-base-q8s7zr?file=/src/App.tsx to reproduce the problem so that I can observe the issue on my side and make sure that the fix reliably addresses it.

To Reproduce Steps to reproduce the behavior:

1. Go to https://mdxeditor.dev/editor/demo
2. Click into source mode
3. Input text "foo:bar"
4. Toggle back to rich-text mode
5. See error

Expected behavior foo:bar rendered as plain text

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. MacOS, Windows] - Windows can act funny sometimes.
• Browser [e.g. Chrome, Safari]

Additional context

[petyosi]

That's treated as a markdown directive. If you're not going to use those, just disable the plugin.