* docs(prompt): add EditorConfig Expert prompt for .editorconfig generation
Adds a new prompt definition that guides the generation of comprehensive .editorconfig files based on project analysis and user preferences, including rule-by-rule explanations and best practices.
* docs(readme): add EditorConfig Expert prompt entry with description and install links
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Co-authored-by: Aung Myo Kyaw <aungmyokyaw@users.noreply.github.com>
