Proposal: `vp run --watch` (re-run tasks on changes) leveraging existing tracking/caching

Problem

In monorepos, a common workflow is “run lint/tests/build continuously as files change.”
mise provides mise watch as a first-class feature. Vite Tasks already has planning/caching and (in the broader Vite+ ecosystem) file dependency ideas, so watch-mode could be especially powerful.

Evidence (primary)

• Vite Tasks CLI currently exposes run and cache ... commands; no watch flag/subcommand is visible in the CLI definition.

Proposed behavior (Unspecified)

• vp run --watch <task> or vp watch <task> (syntax unspecified)
• On file changes, rerun the task (possibly only the necessary affected subtasks)
• Provide debounce/throttle config (unspecified)

Backward compatibility

• Additive feature; no change to current behavior unless used.

Minimal implementation suggestion (MVP)

• Start with a basic file watcher over a configured path set.
• Iterate to use tracked inputs/outputs to narrow watch scope, and integrate with caching.

Comienza con la definición de Vite Tasks CLI y los comandos run y cache existentes para entender dónde podría encajar un watch mode. Revisa el MVP propuesto para observar las rutas configuradas y, después, establece la sintaxis del comando, el comportamiento de las ejecuciones repetidas y las expectativas de debounce; el trabajo estará terminado cuando la interfaz watch acordada y las ejecuciones repetidas básicas ante cambios de archivos estén implementadas sin cambiar el comportamiento normal.