[EPIC] Universal converter (SVG ↔ XML ↔ ImageVector)

[egorikftp]

The project contains a lot of stuff that allows conversion between different formats. This epic will be the entry point for all tasks related to the new converter functionality.

We have a JVM implementation (based on android-build-tools and kotlin-poet code generation) and a new custom KMP parser/generator. There are several feature‑parity gaps between these implementations.

• XML -> SVG converter
• New universal converter module that can interact with abstract parsers and generators (jvm or kmp)
• Make IrImageVector the core entry point for all conversion types (e.g. SVG/XML/ImageVector -> IR -> SVG/XML/ImageVector)