feat: print Dev Server URL on 'u' keypress to reduce terminal clutter

[HTGA75]

• This is a feature

For Bugs and Features; did you add new tests?

No new tests. This is a developer‑experience enhancement only.

Motivation / Use-Case

Sometimes the Dev Server URL scrolls out of view in busy terminals, making it hard to grab.
This change adds a new printUrlOnKeypress option (default false) that, when enabled, registers a keypress listener. Pressing u in the terminal will reprint the current Dev Server URL, reducing noisy automatic logs while still keeping the URL readily accessible.

Addresses discussion in #4907

Breaking Changes

None

Additional Info

• The option is gated behind:

  devServer: {
    printUrlOnKeypress: true
  }

[HTGA75]

👋 Hey @alexander-akait (or @webpack/collaborators), my branch is now up-to-date. Could someone please approve and run the CI workflows, and take a look at the changes? Thanks!

[codecov]

Codecov Report

❌ Patch coverage is 15.38462% with 11 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@ddf7db3). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
lib/Server.js	15.38%	8 Missing and 3 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5489   +/-   ##
=======================================
  Coverage        ?   70.81%           
=======================================
  Files           ?        5           
  Lines           ?     1422           
  Branches        ?      557           
=======================================
  Hits            ?     1007           
  Misses          ?      356           
  Partials        ?       59           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.