chore: migrate toolchain to Vite+

[nyatinte]

What

• Replace tsdown + vitest + standalone oxlint/oxfmt with the unified Vite+ (vite-plus) toolchain
• Add vite.config.ts as a single config entry for fmt, lint, pack, and test; remove tsdown.config.ts and vitest.config.ts
• Update package.json scripts to use vp commands (vp pack, vp check, vp test)
• Add catalog: entries in pnpm-workspace.yaml to pin vite and vitest to Vite+ shims
• Add Vite+ workflow documentation to CLAUDE.md

Why

Consolidating tooling under a single Vite+ CLI (vp) removes the need to maintain separate configs for tsdown, vitest, oxlint, and oxfmt. Vite+ wraps all of them as one cohesive toolchain, reducing configuration surface area.

Note: oxlint integration is not yet working in this branch and will be resolved in a follow-up.

Ref

• voidzero-dev/setup-vp — CI action for Vite+

[changeset-bot]

⚠️ No Changeset found

Latest commit: 78966da

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[github-actions]

Size Change: +7 B (+0.23%)

Total Size: 3.03 kB

Filename	Size	Change
./dist/bin.mjs	3.03 kB	+7 B (+0.23%)

_{compressed-size-action}

[gemini-code-assist]

Code Review

This pull request migrates the project to Vite+, a unified toolchain that replaces several individual tools (such as tsdown, oxlint, and vitest) with a single global CLI (vp). The configuration files for these tools have been removed in favor of a centralized vite.config.ts. I have identified an issue in .zed/settings.json where the configPath still points to a removed configuration file, which will likely break the oxlint language server integration in Zed.

[nyatinte]

The Vitest global type issue is likely to be fixed by voidzero-dev/vite-plus#1165