docs(database tools): Add `gorm-multitenancy` project

[bartventer]

We want to ensure high quality of the packages. Make sure that you've checked the boxes below before sending a pull request.

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• [x] I have read the Quality Standards

Not every repository (project) will require every option, but most projects should. Check the Contribution Guidelines for details.

• [x] The repo documentation has a pkg.go.dev link.
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• [x] forge link (github.com, gitlab.com, etc): https://github.com/bartventer/gorm-multitenancy
• [x] pkg.go.dev: https://pkg.go.dev/github.com/bartventer/gorm-multitenancy/v6
• [x] goreportcard.com: https://goreportcard.com/report/github.com/bartventer/gorm-multitenancy/v6
• [x] coverage service link (codecov, coveralls, etc.): https://coveralls.io/github/bartventer/gorm-multitenancy?branch=master

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• [x] The package has been added to the list in alphabetical order.
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• [x] As far as I know, the package has not been listed here before.

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Please delete one of the following lines:

• [x] I removed the following packages around my addition: (please give a short reason for each removal)

• go-mysql-elasticsearch: Not actively maintained, last commit on Aug 22, 2020, over 200 unresolved issues and 10 open pull requests, majority dating +4 years back.

• kingshard: Not actively maintained, last commit on Feb 23, 2024, over 140 open issues and 20 pull requests, majority dating back over 1 year.

• orchestrator: Not actively maintained, last commit on Feb 28, 2023, over 354 open issues and 65 pull requests, majority dating back over 1 year.

Thanks for your PR, you're awesome! :sunglasses:

[github-actions[bot]]

Thank you for contributing to awesome-go. We will review your contribution as soon as possible.

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[bartventer]

@phanirithvij @cassiobotaro Could you please review this PR and consider merging it? Many thanks!