Update Grant Permission Guide

[fhildeb]

Features

• Updates outdated Grant Permissions Guide of the Expert -> Key Manager Section
• Uses dynamic array encoding to add controllers
• Simplifies descriptions and headings
• Fixes code and adds ethers.js support
• Adds reference to lukso-playground

Playground

• https://github.com/lukso-network/lukso-playground/pull/57

[github-actions[bot]]

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[fhildeb]

Thanks for the feedback, @CJ42. As you can see from the removed WIP banner, this guide was quite outdated. Descriptions were duplicated, code snippets did not work, and the playground was not in sync.

Therefore, this PR combined these two tickets to get everything up to date:

• https://app.clickup.com/t/2645698/DEV-10581 (rework code + descriptions)
• https://app.clickup.com/t/2645698/DEV-10091 (update erc725.js encoding)

Applied the suggestions. LGTM

[Hugoo]

We will do it again from scratch. Closing.