Fix blog authors not defined in authors.yml warnings

[Copilot]

This PR resolves Docusaurus warnings about blog authors not being defined in a centralized authors.yml file. Previously, all blog posts were using inline author definitions which generated 33 warnings during build.

Changes Made

Created blog/authors.yml with proper author definitions:

• defang_team: Defang Team with company branding
• linda_lee: Linda Lee (Software Engineering Intern at Defang)
• raphael_titsworth_morin: Raphaël Titsworth-Morin (Software Engineer at Defang)

Updated all blog posts to reference authors by key instead of inline definitions:

• Changed author: Author Name to authors: author_key in frontmatter
• 31 posts now use authors: defang_team
• 1 post uses authors: linda_lee
• 1 post uses authors: raphael_titsworth_morin

Benefits

• Eliminates all author-related warnings during Docusaurus build
• Centralizes author information for easier maintenance and consistency
• Follows Docusaurus best practices for blog author management
• Maintains existing functionality while improving code organization

The changes are minimal and focused, updating only the author references without affecting any other blog content or functionality.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Authors are not defined in authors.yml</issue_title>
<issue_description>[WARNING] Some blog authors used in "2024-03-28-slackbot-sample.md" are not defined in "authors.yml":

• {"name":"Raphaël Titsworth-Morin","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2024-06-01-june-product-updates.md" are not defined in "authors.yml":

• {"name":"Defang Team","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2024-07-01-july-product-updates.md" are not defined in "authors.yml":

• {"name":"Defang Team","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2024-07-31-july-product-updates-2.md" are not defined in "authors.yml":

• {"name":"Defang Team","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2024-09-30-september-product-updates.md" are not defined in "authors.yml":

• {"name":"Defang Team","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2024-11-12-hard-lessons-from-hardware.md" are not defined in "authors.yml":

• {"name":"Linda Lee","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2024-11-13-october-product-updates.md" are not defined in "authors.yml":

• {"name":"Defang Team","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2024-12-04-launch-week.md" are not defined in "authors.yml":

• {"name":"Defang Team","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2024-12-11-product-hunt.md" are not defined in "authors.yml":

• {"name":"Defang Team","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you want to allow inline blog authors, you can disable this message by setting onInlineAuthors: 'ignore' in your blog plugin options.
More info at https://docusaurus.io/docs/blog

[WARNING] Some blog authors used in "2025-02-07-january-product-updates.md" are not defined in "authors.yml":

• {"name":"Defang Team","key":null,"page":null}

Note that we recommend to declare authors once in a "authors.yml" file and reference them by key in blog posts front matter to avoid author info duplication.
But if you...

Fixes #296

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