suppor JSON Schema for vite-task.json

[ubugeeei]

#32 (comment)

[linear]

VP-172

[branchseer]

vite-task.json is for vite_task_bin, which is a Rust binary for internal development and testing so we don't have to build the whole vite+. It's not meant to be the config file for end users.

For end users, vite-task is a part of vite+. The configuration lives in vite.config.ts. And we already generate the ts definition: https://github.com/voidzero-dev/vite-task/blob/e3afc2fbef82d574b2b76cb20908a5ae210f3439/crates/vite_task_graph/task-config.ts

[branchseer]

Clarified in https://github.com/voidzero-dev/vite-task/blob/398a147fd1ed42a88585d3a9481f200c3e56a2f4/CONTRIBUTING.md