[WIP] Add open source license file for the project

[Copilot]

• Add LGPL-3.0 license file to the repository (license already declared in setup.py as LGPL3)
• Verify the license file is correctly formatted
• Commit the changes

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add an open source license file for this projet.</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add an open source license file for this projet. #5

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[AlexandreDecan]

@copilot try again

[AlexandreDecan]

@copilot try again, if it fails, try another strategy.