build: run Vite+'s type-aware lint on tsrs's own linter - #754

Summary

Stacked on #753. Vite+'s type-aware lint (the part of vp lint, vp check and vp staged that type-checks) runs on tsrs's own linter, tsrs-lint, instead of Vite+'s bundled tsgolint (ADR-0055 → Consequences). tsrs 0.21 and later ship it: tsgolint's headless protocol and its 61 type-aware rules.

vp lint
  OXLINT_TSGOLINT_PATH = resolve("oxlint-tsgolint/bin/tsgolint")   # Vite+ sets it itself
    oxlint-tsgolint → link:./tools/tsrs-lint-shim                  # pnpm-workspace.yaml override
      bin/tsgolint.js → the `tsrs` package's `tsrs-lint` bin, in-process

• The shim has no package.json on purpose. With one, the effect-tsgo patch step in prepare mistakes it for Vite+'s oxlint-tsgolint and fails the install.
• tsrs here is the linter only. The typecheck is still effect-tsgo tsrs.

Evidence

Whole-repo vp lint with type-check, two runs each, macOS arm64:

• Still type-aware: a probe file reports typescript(TS2322) and no-floating-promises.
• Local checks pass: vp check, vp run -r typecheck (16/16), prepare and git-install:check.
• Tests: vp run -r test passed 16/16. Two runs of the server suite each hit a different timing failure while load average was around 20 from other sessions. Each failing file then passed on its own, and the server suite passed in full once load dropped.

Merge Danger

Door: two-way. Removing the override and tsrs puts back Vite+'s tsgolint.

Blast Radius: lint. Ways it can break:

• A Vite+ upgrade. If Vite+ starts looking for its backend elsewhere, vp lint fails loudly with Error running tsgolint. dependencies.md has the check to run on an upgrade.
• Windows. Vite+ looks for tsgolint.exe or .cmd there, so the shim doesn't run. macOS and Linux, including CI and the Container, are covered.
• Version pin. tsrs is pinned at 0.24 because 0.25 was still under pnpm's day-old minimum release age.

Plan

• The owner asked to bring tsrs back under Vite+ as a follow-up to build: install with pnpm and check, lint, format and run tasks with Vite+ #753, then to "switch to the official cli".
• So vp lint and vp check now run the tsrs package's tsrs-lint as the type-aware backend, keeping type-check and the type-aware rules.
• ADR-0055, ADR-0028's status line and dependencies.md say so.
• The shim-free route waits. It is effect-tsgo --tsrs-lint vp lint (@effect/tsgo 0.68 and later), which needs oxlint 1.91 or later, so a Vite+ past 1.4.0. That waits on the Vitest 5.1 workerd issue.