Feat code block

[Moon-DaeSeung]

Description of Changes

Here is reference: #25

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support 'code' block

• I support java, js, kotlin, exliar etc..

Review point

To reproduce

• npm run story:start
• click 'your created block' on the Storybook left side panel

Screenshot

Review Guide

Reviews are conducted based on priority levels, such as p0, p1, p2, p3, p4, and p5.
p0 ~ p2: If the author decides not to reflect a review for p0 to p2, it signals that a proper discussion with the reviewer is
necessary. It is expected that the review will be resolved either through incorporating the feedback or through further discussion.
p3: indicates that the reviewer has identified a significant issue, but either lacks a clear solution or the comment lacks sufficient context. Further explanation or additional discussion on the reviewer's concerns is needed.
p4, p5: p4 and p5 suggest low priority, and if the author does not deem them important, these comments can be disregarded.

[myjeong19]

Thank you very much for your contribution. It's an excellent code block. However, there are two issues:

P1. In the code folder's index part, there is an unused children prop. Is there a particular reason for this?
P2. In the markdown section, the createInline(/(~~?)(?:(?!~))+\2/.source) part has an error.
I believe it should be corrected from \2/ to \/2/.

[Moon-DaeSeung]

@myjeong19 I fix it. please check this

[myjeong19]

GOOOD!