Migrate "params" from core to an add-on

The "params" add-on should be moved out of zaproxy core to allow for easier upgrades/enhancements.

https://github.com/zaproxy/zaproxy/tree/main/zap/src/main/java/org/zaproxy/zap/extension/params

The initial PR has already been opened:

• https://github.com/zaproxy/zap-extensions/pull/6933

Outstanding tasks:

• Have other add-ons use the new add-on.
  • Handled in: https://github.com/zaproxy/zap-extensions/pull/7385
• Deprecate/disable core functionality.
  • Add the add-on to the weekly.
  • Both handled in: https://github.com/zaproxy/zaproxy/pull/9339
• Migrate params DB components (from core to add-on)
  • Added to: https://github.com/zaproxy/zap-extensions/pull/6933
• Remove params content from zap-core-help
  • Handled in: https://github.com/zaproxy/zap-core-help/pull/631
  • Add placeholder/redirect on the website
    • Examples
    • Handled in: https://github.com/zaproxy/zaproxy-website/pull/3820

[!NOTE]
Currently for testing purposes it's necessary to manually disable the core extension in ZAP's options (https://www.zaproxy.org/docs/desktop/ui/dialogs/options/ext/). (I will look at only loading/enabling the new one when core functionality is deprecated/disabled, in another PR if needed depending on timing etc.)