Migrate JS/TS templates to @cartesi/rollup, pnpm and node 24

[tuler]

Summary

Migrates the JavaScript and TypeScript templates from the rollup HTTP server to the @cartesi/rollup package, which talks directly to the rollup device of the Cartesi Machine, and refreshes the toolchain around it.

Key Changes

Source code

• Replaced the HTTP polling loop with rollup.run(), whose handlers receive typed request objects: msgSender, index, blockTimestamp, and payload as a Buffer
• Updated handler signatures: advance handlers return boolean (true accepts the input, false rejects it) instead of a status string, and inspect handlers answer with reports
• Removed the OpenAPI schema generation: the schema.ts codegen script is gone, along with openapi-fetch, openapi-typescript and viem, since the package ships its own types
• Both templates are ESM now, bundled to dist/index.mjs

Docker

• The entrypoint is node itself, with index.mjs as the command. rollup-init only execs rollup-http-server, which bridges the rollup device to HTTP, and the application now talks to the device directly
• Added a riscv64 dependencies stage: @cartesi/rollup is a native addon, and its installation selects the prebuilt binary of the platform it runs on. The build stage still bundles the application code on the build platform, with the dependencies left external
• Removed ROLLUP_HTTP_SERVER_URL, and dropped /opt/cartesi/bin from PATH, as the machine guest tools are installed in /usr/bin
• Bumped node to 24.17.0, on both the riscv64 base and the build stage

Toolchain

• pnpm replaces yarn, pinned by the packageManager field of package.json and installed with corepack
• Added pnpm-workspace.yaml, which allows the build script of @cartesi/rollup and exempts it from the minimum release age, so that a freshly published pre-release can be installed. The build script of esbuild, which comes in as a dependency of tsx, is denied, as tsx runs without it
• rolldown replaces esbuild, configured in rolldown.config.js and rolldown.config.ts
• TypeScript template: typescript 7, tsx in place of ts-node, tsc only type checks, and vitest is dropped, as the template has no tests

Documentation

• Updated READMEs: the package, the pnpm setup, and running on the development host with the mock driver through CMT_INPUTS, with a pointer to @cartesi/codec for encoding advance inputs

Notable Implementation Details

• @cartesi/rollup is a pre-release, published under the alpha npm tag
• The same application code runs in both environments: on the development host the package uses a mock driver, which reads the inputs listed in CMT_INPUTS from files and writes the outputs next to them, and inside the Cartesi Machine it talks to the real rollup device
• The native addon is the reason the dependencies are installed for riscv64 and kept out of the bundle, instead of being bundled with the application code

https://claude.ai/code/session_01YQk8hkw6zUJe38hM7LNd4r

[tuler]

We should wait for Cartesi CLI version with cartesi-machine 0.21 support, but this is pretty much ready for review.