Allow parsing of fenced code blocks inside lists

[Jeffcole1]

While working with the Mudblazor.Markdown package, I discovered that, if a block of Markdown text being parsed included a fenced code block within a list, the code block would not be rendered in the output. This pull request is designed to correct this issue.

The following Markdown can be used as an example:

To prevent the warning message regarding the deprecation of the mysql_native_password plugin from being logged, you have a couple of options:

Option 1: Update User Authentication Method:

1. Connect to your MySQL server using a MySQL client, such as the mysql command-line tool:

   mysql -u username -p

2. Once connected, run the following command to alter the user's authentication method:

   ALTER USER 'username'@'hostname' IDENTIFIED WITH caching_sha2_password;

   Replace 'username' with the actual username and 'hostname' with the appropriate hostname or IP address. If you want to update for all users, replace 'username'@'hostname' with '*'@'%'.

3. Repeat this process for each user on your MySQL server.

[MihailsKuzmins]

Also please add a unit test for your code sample (mentioned in the description:

To prevent the warning message regarding the deprecation of the mysql_native_password plugin from being logged, you have a couple of options:

Option 1: Update User Authentication Method:

1. Connect to your MySQL server using a MySQL client, such as the mysql command-line tool:

   mysql -u username -p

2. Once connected, run the following command to alter the user's authentication method:

   ALTER USER 'username'@'hostname' IDENTIFIED WITH caching_sha2_password;

   Replace 'username' with the actual username and 'hostname' with the appropriate hostname or IP address. If you want to update for all users, replace 'username'@'hostname' with '*'@'%'.

3. Repeat this process for each user on your MySQL server.

[MihailsKuzmins]

First of all thank you for making the PR.

But sorry. this implementation is just copy paste from lines 178-182 and it cannot be accepted. Please do the following:

1. create a function RenderFencedCodeBlock(RenderTreeBuilder, FencedCodeBlock) and use it on the line 176

// 176
case FencedCodeBlock code:
{
	RenderFencedCodeBlock(builder, code);
	break;
}

// 464 (or somewhere else at the end)
protected virtual void RenderFencedCodeBlock(in RenderTreeBuilder builder, in FencedCodeBlock code)
{
	var text = code.CreateCodeBlockText();

	builder.OpenComponent<MudCodeHighlight>(ElementIndex++);
	builder.AddAttribute(ElementIndex++, nameof(MudCodeHighlight.Text), text);
	builder.AddAttribute(ElementIndex++, nameof(MudCodeHighlight.Language), code.Info ?? string.Empty);
	builder.AddAttribute(ElementIndex++, nameof(MudCodeHighlight.Theme), CodeBlockTheme);
	builder.CloseComponent();
}

2. Instead of your code please use this (there is no need to create a new li element for the code block, at least this is how it should work in your example):

case FencedCodeBlock x:
{
	RenderFencedCodeBlock(builder, x);
	break;
}

Then it will look a bit similar to what is rendered on GitHub. However, the line "Replace username .." should not have the "li" tag, so if you can also fix this problem it would be nice. If you do not want to do it, then I can do it in a separate PR. To give you a hint - it can be determined by "Parent.Order" properties of ParagraphBlock or FencedCodeBlock is the parent is ListItemBlock

[MihailsKuzmins]

Will be fixed in #236