Chore(web-react): Remove Storybook addon meant for migration

[literat]

Description

• remove @storybook/addon-mdx-gfm that was remaining form migration process

Additional context

https://storybook.js.org/addons/@storybook/addon-mdx-gfm

Issue reference

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Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Follow the PR Title/Commit Message Convention.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

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✅ Successfully ran 3 targets

• lerna run types --no-sort
• lerna run test
• lerna run lint --parallel --no-sort

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[github-actions]

coverage: 69.754% (-26.7%) from 96.46% when pulling 5bae716 on docs/remove-storybook-plugin into 0cb30d5 on main.