Policy update

Going forward, all new language bindings should be maintained as separate standalone repositories.

Why this policy exists:

• Maintaining language bindings in the monorepo creates a maintenance bottleneck
• Each binding requires reimplementing large portions of the TypeScript API
• When maintainers become busy or move on, bindings fall behind and accumulate technical debt

Examples of binding requests:

• OpenTUI Python 🐍 #217 - Python bindings
• Svelte Reconciler ? #107 - Svelte reconciler
• opentui dotnet support #236 - .NET bindings

The main opentui monorepo will officially support only: @opentui/core, @opentui/react, and @opentui/solid.