Add LICENSE.txt to allow unrestricted use and modification

[Copilot]

This PR adds a LICENSE.txt file to the repository to address the lack of licensing information and explicitly permit unrestricted use and modification of the repository content.

Changes Made

• Added LICENSE.txt in the repository root using the Unlicense
• The Unlicense dedicates the work to the public domain with maximum permissiveness

License Details

The Unlicense was chosen because it:

• ✅ Allows any private or professional use without restriction
• ✅ Explicitly permits modifications to all content
• ✅ Has no usage restrictions or limitations
• ✅ Dedicates the work to the public domain for maximum accessibility

This is particularly appropriate for a repository containing documentation, guidelines, and instructional content like AL development standards and GitHub Copilot instructions, ensuring the community can freely use, modify, and distribute these resources.

Repository Impact

• No changes to existing functionality or content
• Provides clear legal framework for users and contributors
• Enables unrestricted commercial and non-commercial use
• Allows derivative works and modifications without attribution requirements

Fixes #45.

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[FBakkensen]

@copilot update LICENSE.txt that this is not a software repo, but documentation repo

[FBakkensen]

This is not software repo, this is a documentation repo

[Copilot]

Pull Request Overview

This PR adds a LICENSE.txt file to explicitly license the repository content using the Unlicense, thereby dedicating the work to the public domain.

• Added LICENSE.txt in the repository root with Unlicense text
• Establishes clear public domain licensing for unrestricted use and modifications

[Copilot]

@copilot update LICENSE.txt that this is not a software repo, but documentation repo

Updated LICENSE.txt to use documentation-appropriate language instead of software terminology. Changed all references from "software" to "documentation" and updated content format descriptions to better reflect the nature of this repository. Commit: 2f69cc8

[Copilot]

This is not software repo, this is a documentation repo

The LICENSE.txt has already been updated to reflect that this is a documentation repository. All references to "software" have been changed to "documentation" and the content appropriately describes documentation licensing rather than software licensing (commit 7700a12).