- Update all crates and packages to version 0.1.19
- Add @macroforge/svelte-preprocessor package for expanding macros in Svelte
  scripts
- Introduce comprehensive tests for macro expansion and warnings
- Add macro hover support tests in TypeScript plugin
- Integrate macroforgePreprocess into playground Svelte config
- Add Vitest testing setup and Tailwind CSS integration in playground
- Add E2E tests for MCP server tools