Fix/mcp fixes

[DavertMik]

Summary

Cluster of fixes around the MCP server, init, dryRun, workers, and a few core export tweaks. Most changes are about making the MCP loop usable in real projects (rich tool descriptions, headless default, agent-friendly return values) plus paying down a few quality-of-life issues.

What's in here

MCP server (bin/mcp-server.js)

• Rich tool descriptions that point at traceFile, aiTraceHint, and pauseAt/continue so an agent picking up the tool list knows when to do what.
• run_code runs in a scope that mirrors the Mocha environment: I, helpers, locate, within, session, secret, inject, pause, tryTo, retryTo, hopeThat, step, element, eachElement, expectElement, plus every support object. Response advertises every symbol via availableObjects.
• grep argument on run_test / run_step_by_step, mirroring the CLI --grep flag.
• settleMs argument on snapshot / run_code (default 300ms) so animations / re-renders don't race the capture.
• Browser defaults to headless (browser: { show: false }) — opt into headed with plugins={ browser: { show: true } }.
• aiTraceHint surfaces in tool responses when aiTrace is disabled, telling the agent how to re-enable it for richer per-step capture.
• installShutdownHooks ensures the container is torn down on SIGTERM/SIGINT/beforeExit.
• formatReturnValue plus WebElement.describe() / toJSON so returning an element from run_code produces a usable plain-object snapshot instead of {}.

Init (lib/command/init.js)

• -y, --yes flag — skip prompts and use sensible defaults (Playwright + chromium, BASE_URL env for url).
• Default test glob moved to ./tests/*_test.js for new projects.

Dry run (lib/command/dryRun.js)

• Stop disabling every plugin. Only block interactive (pause, pauseOnFail) and external-I/O ones (analyze, aiTrace, pageInfo, heal). Plugins that register support objects (e.g. auth → I.login) keep working — helper calls inside are already no-op'd by HelperStep when store.dryRun is true.

Core

• lib/config.js: populate globalThis.codeceptjs at config-import time so @codeceptjs/configure proxies don't throw before initCodeceptGlobals runs.
• lib/globals.js: pause, inject, share stay global even under noGlobals: true. They're the everyday debugging / wiring entry points and have no useful import alternative for page-object code that runs before the container is available.
• lib/index.js: add session, inject, locate to named/default exports.
• lib/mocha/factory.js: default cleanReferencesAfterRun: false. Mocha 10+ disposes the instance after .run(), which broke every subsequent MCP run_test call.
• lib/parser.js + lib/mocha/inject.js: only warn on the legacy (I) parameter format when explicitly asked. Stops noisy errors during normal injection.
• lib/plugin/browser.js: merge plugin config with _args so options set in codecept.conf.js aren't lost when passing CLI flags.
• lib/workers.js: drop the hardcoded 10-minute overall timeout and make per-worker timeout configurable via CODECEPT_WORKER_TIMEOUT.

Docs

• docs/continuous-integration.md: rewritten end-to-end (GitHub Actions / GitLab / Bitbucket / Jenkins / CircleCI examples, @testomatio/reporter integration via the GitHub + HTML pipe combo).
• docs/migration-4.md: small touch-ups.

Type of change

• 🚀 New functionality
• 🐛 Bug fix
• 📋 Documentation changes/updates

Test plan

• npm test (existing unit suites — trace_test passes; pre-existing REST suite needs the local fixture server)
• MCP end-to-end: start_browser → run_code → snapshot → run_test with and without pauseAt
• codeceptjs init -y produces a working config
• codeceptjs dry-run keeps auth and similar support-object plugins functional