Add README and MIT License

[Copilot]

The repository lacked documentation and licensing, making it unclear what the project does and under what terms it can be used.

Changes

• README.md: Documents the project purpose (dual i3/Sway config), features, directory structure, installation steps, package lists, environment-aware scripts, keybindings table, customization, and troubleshooting
• LICENSE: MIT License with copyright assigned to Hallenbarter Jürg Georg

Original prompt

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This section details on the original issue you should resolve

<issue_title>Create Readme and license</issue_title>
<issue_description>Create a README.md that explains the reason and aim of this project.
And create a suitable license.</issue_description>

<agent_instructions>create MIT License</agent_instructions>

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

• Fixes Create Readme and license #3

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