[rami-hatoum]

What this changes

The npm package @on.auto/runtime ships every workspace package's sources and runs the server from them, but a program that wanted to compose the core from the package could not: the packages' own names resolved only after the launcher's run-time links, no exports entry named a package, and the pack dropped every testing folder. The package is now a library as well as a server:

• its package.json carries an exports map built from each package's own exports, 54 subpaths in all, the testing entries among them;
• the testing folders of every package that names one are shipped, so a program's tests can use the fakes and the behaviour suites; the server's own testing and development folders stay out;
• the npm README says how a program composes the core from the package, by subpath, with the one-line alias a bundler needs to resolve the packages' own names, its list written by the pack so it never goes stale;
• the pack checks itself: it unpacks its result into a temporary program and imports every subpath on Node's own loader, with the alias as a resolve hook; and the server still starts from the pack as before.

The guide's sentence about what the package ships is made exact.

Tests

• Every subpath imports from the packed result; with the alias removed, each fails on a package name, which is the problem this solves.
• The pack's scan for undeclared imports reads imports inside template strings correctly, with a case for it.
• The packed runtime runs the existing npx steps locally: version, key, health, a computation run, a workflow run, a stop.
• pnpm check passes.