Add Ability to Pause/Resume Test from Web UI

[Kobiwizards]

Prerequisites

• I am using the latest version of Locust
• I am suggesting a new feature, not asking a question

Description

Description: Currently, once a test is running, users cannot pause and resume it from the web UI. They must stop and restart, losing accumulated statistics. This feature would add pause/resume buttons that:

Pause all running users (maintain their state)

Resume from where they left off

Maintain statistics during pause

Show "PAUSED" status indicator

Files to modify: locust/runners.py, locust/web.py, locust/webui/ (frontend), locust/test/test_runners.py

[cyberw]

Probably not worth it, sorry. The graphs should be maintained between runs though?