Refined some files

[DheekshaGopika]

.editorconfig

Added .editorconfig file so that the configuration of the workspace remains the same in other systems too

src/components/index.js

Added index.js file for easy importing files in other components or files

public/index.html

Changed the title of the document from React App to Pokémon

other files

Minor fixes like changes in importing and single quotes -> double quotes replacement

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[BhavyaCodes]

excellent work!