Improve README.md

Changes: - Added logo for light/dark mode Light | Dark :-------------------------:|:-------------------------:  |  - Replaced image of third party terminal with Windows Terminal Before | After :-------------------------:|:-------------------------:  |  - Removed temporary message - Removed ISO related text > ISO creator was removed in ca7f3aa7cfa0f40c2d204cb7ec54cd343cbf0da4 - Removed empty `📄🗝 Components License` section - Removed obsolete commands from the `📃 Automation of the script` section - Removed other unnecessary stuff - Added and fixed some PowerShell commands - Added some missing commands to the `📃 Automation of the script` section - Reworded and improved text - Corrected grammar and spelling