feat: Support full markdown syntax

[liamcho]

How to test?

• yarn dev. try copy and paste here then send a message.
• or send message like below:
  • can you give me some random message with some markdown syntax applied?
  • can you give me another one with h1, h2, h3, ol and ul?
  • include any other markdown syntax I missed out. give me random authentic message.

You can also test workflow by sending below message:

• give me a markdown message

Changes

• Added support for wider range of markdown syntaxes

ticket: AC-4384

Additional Notes

• To run snapshot test locally: https://sendbird.atlassian.net/wiki/spaces/AC/pages/2610724994/Widget+snapshot+test+plan

Checklist

Before requesting a code review, please check the following:

• [Required] CI has passed all checks.
• [Required] A self-review has been conducted to ensure there are no minor mistakes.
• [Required] Unnecessary comments/debugging code have been removed.
• [Required] All requirements specified in the ticket have been accurately implemented.
• Ensure the ticket has been updated with the sprint, status, and story points.

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[github-actions]

Size Change: +15.1 kB (+2.5%)

Total Size: 619 kB

Filename	Size	Change
./dist/__bundle-b5ef7de4-********.js	891 B	+1 B (+0.11%)
./dist/index-********.js	304 kB	-1.66 kB (-0.54%)
./dist/index.es.js	172 B	-1 B (-0.58%)
./dist/index.umd.js	289 kB	+6.69 kB (+2.37%)
./dist/Placeholder.error-********.js	345 B	-1 B (-0.29%)
./dist/Placeholder.loading-********.js	184 B	-2 B (-1.08%)
./dist/PlaceholderCommon-********.js	245 B	-2 B (-0.81%)
./dist/style.css	9.6 kB	+923 B (+10.64%)	⚠️
./dist/TokensBody-********.js	9.16 kB	+9.16 kB (new file)	🆕

ℹ️ View Unchanged

Filename	Size
./dist/__bundle-46d64517-********.js	4.01 kB
./dist/__bundle-7c3d40f4-********.js	21 B
./dist/Placeholder.noChannels-********.js	183 B
./dist/Placeholder.noMessages-********.js	183 B

_{compressed-size-action}

[bang9]

모든 스텝에 들어가는거면, 이건 loadWidget 에 들어가도 되지 않나여?

[liamcho]

넵넵 loadWidget 함수로 빼겠씁니다

[liamcho]

done