Add LeanCode and contributors to AUTHORS

[mkucharski17]

This PR adds LeanCode (a Flutter development company) and three of its contributors to the AUTHORS file.

Contributors added:

• LeanCode — company
• Piotr Denert (GitHub: pdenert) — PRs in flutter/packages
• Marcin Chudy (GitHub: mchudy) — PRs in flutter/packages
• Paweł Jakubowski (GitHub: FirentisTFW) — PRs in flutter/packages

No issue is required as this is a trivial AUTHORS file update.

Pre-Review Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene page, which explains my responsibilities.
• I read and followed the relevant style guides and ran the auto-formatter.
• I signed the CLA.
• The title of the PR starts with the name of the package surrounded by square brackets, e.g. [shared_preferences]
• I linked to at least one issue that this PR fixes in the description above.
• I followed the version and CHANGELOG instructions, using semantic versioning and the repository CHANGELOG style, or I have commented below to indicate which documented exception this PR falls under¹.
• I updated/added any relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or I have commented below to indicate which test exemption this PR falls under¹.
• All existing and new tests are passing.

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Note: The Flutter team is currently trialing the use of Gemini Code Assist for GitHub. Comments from the gemini-code-assist bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed.

Footnotes

1. Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling. ↩ ↩²

[gemini-code-assist]

Code Review

This pull request adds LeanCode and three of its contributors to the AUTHORS file. For improved maintainability of the file, it is suggested to sort the newly added entries alphabetically. Additionally, please note that the pull request title does not conform to the repository's contribution guidelines, which mandate a scope prefix (e.g., [docs]).

[stuartmorgan-g]

This is not the email address that was used for commits, and doesn't appear publicly anywhere in the repo as far as I can tell. @mchudy can you confirm that you want to have this email address in the repository?

[mchudy]

yes, that's ok

[stuartmorgan-g]

LGTM

[bparrishMines]

LGTM