docs: update resolveSnapshotPath example to show context.config usage for projects

[Copilot]

Description

Adds documentation example showing how to use the context.config parameter in resolveSnapshotPath to access project-specific configuration (e.g., project name).

Resolves #9109

Example added:

import { join, dirname, basename } from 'node:path'
import { defineConfig } from 'vitest/config'

export default defineConfig({
  test: {
    resolveSnapshotPath(testPath, snapExtension, context) {
      return join(
        dirname(testPath),
        '__snapshots__',
        context.config.name ?? 'default',
        basename(testPath) + snapExtension,
      )
    },
  },
})

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Tests

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Warning

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I tried to connect to the following addresses, but was blocked by firewall rules:

• cdn.jsdelivr.net
  • Triggering command: /usr/local/bin/node /usr/local/bin/node --require /home/REDACTED/work/vitest/vitest/node_modules/.pnpm/[email protected]/node_modules/tsx/dist/preflight.cjs --import file:///home/REDACTED/work/vitest/vitest/node_modules/.pnpm/[email protected]/node_modules/tsx/dist/loader.mjs .vitepress/scripts/fetch-avatars.ts (dns block)

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Original prompt

context #9109
update code example in https://vitest.dev/config/resolvesnapshotpath.html to show context.config usage for project

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