feat(renderer): implement EJS renderer skeleton to emit pages & lib files

[thopatevijay]

• Add packages/cli/src/renderer.ts.

• Provide EJS templates under /templates/shadcn:

  • pages/_app.ejs

  • pages/index.ejs

  • pages/instruction.ejs

  • lib/anchorClient.ejs

  • lib/pdaHelpers.ejs

  • components/FormControls minimal

• Implement renderToDir(ir, outDir, opts) that writes files accordingly.

Acceptance criteria

• Running the render function with the sample IR writes a package.json, pages/_app.tsx, one instruction page, and lib/anchorClient.ts in the target outDir.

• Generated files contain program ID and instruction placeholders where expected.