feat: add codeceptjs/assertions subpath and hopeThat.noErrors()

[DavertMik]

Summary

• New codeceptjs/assertions subpath exports the built-in assertion factories (equals, includes, empty, truth) so they can be used directly from scenarios and custom helpers — no chai/jest/node:assert needed to get CodeceptJS-style failure messages.
• New hopeThat.noErrors() on codeceptjs/effects. Call it once at the end of a scenario to fail the test if any hopeThat(...) soft assertion failed. Failures are collected into a module-level array that resets on event.test.before, and noErrors() throws a single empty('soft assertions') assertion with an array diff instead of a raw Error. Existing conditionalError notes on test.notes are preserved for reporters.
• New docs/assertions.md page covering built-in see/dontSee, ExpectHelper, the new codeceptjs/assertions API, external libraries, reusable custom helpers, WebElement-based assertions, soft assertions (hopeThat + hopeThat.noErrors), and secret() masking.

Example

import { hopeThat } from 'codeceptjs/effects'

Scenario('registration form shows every validation error at once', async ({ I }) => {
  I.amOnPage('/register')
  I.click('Create Account')

  await hopeThat(() => I.see('Email is required', '#email-error'))
  await hopeThat(() => I.see('Password is required', '#password-error'))
  await hopeThat(() => I.see('You must accept the terms', '#terms-error'))

  hopeThat.noErrors()
})

import { equals, includes, empty } from 'codeceptjs/assertions'

const total = await I.grabTextFrom('.cart-total')
equals('cart total').assert(total, '$42.00')
// expected cart total "$10.00" to equal "$42.00"

Test plan

• Verified codeceptjs/assertions subpath resolves and each factory produces the expected failure message
• Verified hopeThat.noErrors() end-to-end against test/acceptance/codecept.Playwright.js:
  • scenario with no failures → passes
  • scenario with two failed hopeThat calls → fails with aggregated expected soft assertions '[...]' to be empty and an array diff
  • subsequent scenario starts clean (state reset on test.before)
• Existing lib/effects.js unit tests still pass (no behavior change to the happy path; only adds a push-and-forget to the failures array in the catch handler)

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