Add editorjs-code-editor and Cubite

[amirtds]

Summary

• Adds editorjs-code-editor to the Block Tools > Code section — a code editor block with 12 language modes, 4 visual styles, and in-browser Python execution via Pyodide WebAssembly
• Adds Cubite to the Projects Using Editor.js section — a multi-tenant LMS platform with 23 custom EditorJS plugins

About editorjs-code-editor

A feature-rich code editor block for Editor.js that stands out with in-browser Python execution powered by Pyodide WebAssembly (no server required):

• 12 language modes with CodeMirror 6 syntax highlighting
• Run Python code directly in the browser via Pyodide WASM
• 4 visual styles (Default, Bordered, Terminal, Minimal)
• Console output panel with error styling and execution timing
• Dark mode auto-detection
• Self-contained CSS with customizable properties
• MIT licensed

Repository: https://github.com/amirtds/editorjs-code-editor

[amirtds]

@neSpecc Appreciate if you can take a look at this PR when you have some time, thank you