Generate from Pixi.js documentation strings

Right now everything is copy-pasted / edited manually. Most of it could be probably automated, providing for greatly reduced cost of following Pixi.js updates.

The issue suggests automating generation from Pixi.js documentation strings to reduce manual copy-pasting. First, examine the current manual process in the repository to understand the structure of the wrapper. Look for existing scripts or build tools, and research how Pixi.js documentation is structured (likely JSDoc or similar). Determine what output format is needed (Kotlin code or docs) and explore libraries for parsing documentation strings. 'Done' means a script or tool that can generate Kotlin wrapper code from Pixi.js docs.

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