Clear and concise description of the problem

This is a request to support this case:

> \[!TIP]
> Some tip here

Note the \ character before the [ for escaping. This works with GitHub already.

Example below:

with \ character:

without \ character:

Suggested solution

We should support \ character before a marker

Alternative

No response

Additional context

No response

Validations

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• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.