Revise and Modernise README.md

The current README.md is outdated, long, and non-functional. It needs a complete revision to better showcase the plugin and make it easier for users to understand and adopt.

Improvements Needed

• Add screenshots that show how the plugin looks in action (for example, before/after, with and without the plugin).
• Include a short demo video that demonstrates usage, such as compiling and running code with a single key-press.
• Update the structure to include modern README components: badges, concise installation instructions, collapsible sections, and a clean feature list.
• Add simple graphs or visuals to illustrate workflows, performance benefits, or the overall plugin architecture.
• Provide a support link (e.g., Buy Me a Coffee or something related) for users who want to contribute to ongoing development.