Lint with Oxlint through Vite+ instead of ESLint

Replace ESLint, typescript-eslint, eslint-plugin-node and the flat
config helpers with vite-plus, which runs Oxlint for vp lint. The rules
are carried over from eslint.config.mjs by @oxlint/migrate into the lint
section of the root vite.config.ts. The formatting rules ESLint
deprecated run as @stylistic rules through Oxlint's JS plugin support,
and disable comments naming them are updated to the @stylistic names.

@stylistic understands TypeScript syntax that the core rules skipped,
so the autofix adds missing semicolons and spaces in type literals and
aliases. Leading | and & in multiline types stay where they were.

Oxlint's node/no-sync also reports identifiers ending in Sync that are
not calls. The test helper techSync is renamed and the two other names
are ignored.

Refs #1127

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

plugins/player_sync/instance.ts

@@ -10,12 +10,12 @@ import { type Component, enabledComponents, stripPlayerData } from "./components
 
 type IpcPlayerName = {
 	player_name: string
-}
+};
 
 type IpcDownloadRequest = {
 	player_name: string,
 	recipe_notifications?: string,
-}
+};
 
 /** Components as an escaped JSON object for the scenario. */
 function componentsJson(enabled: Set<Component>) {
@@ -30,7 +30,7 @@ type IpcAcquireResponse = {
 	message?: string,
 	epoch?: number,
 	token?: string,
-}
+};
 
 /**
  * Splits string into array of strings with max of a certain length
@@ -64,7 +64,7 @@ export type RecipeNotificationDelta = {
 	remove?: string[],
 	/** add is the whole stored list, sent without the instance's: the save works out what to remove */
 	full?: true,
-}
+};
 
 /**
  * Compute the changes needed to turn the current cleared recipe list into the stored one

plugins/player_sync/messages.ts

@@ -30,7 +30,7 @@ export type IpcPlayerData = {
 	// Components the upload was serialized with, all when missing
 	components?: Record<string, boolean> | unknown[],
 	destination_instance_id?: number, // set_destination's instance, on the leave upload only; not player data
-}
+};
 
 // Marks tombstones in player_sync.json
 const jsonReserved = { deleted: Type.Optional(Type.Never()) };