feat(pointing): Allow input processor aborting before sending to central

[badjeff]

Add exit point in input processor loop on split input. That allow aborting the chain of processing before sending event to central from split peripheral.

Two ZIP modules had been designed with this change, that reduce BT loading between peripherals and central (mostly, at dongle mode)

• Rate limiter: https://github.com/badjeff/zmk-input-processor-report-rate-limit
• Compressor: https://github.com/badjeff/zmk-input-processor-xyz

PR check-list

• Branch has a clean commit history
• Additional tests are included, if changing behaviors/core code that is testable.
• Proper Copyright + License headers added to applicable files (Generally, we stick to "The ZMK Contributors" for copyrights to help avoid churn when files get edited)
• Pre-commit used to check formatting of files, commit messages, etc.
• Includes any necessary documentation changes.

[petejohanson]

Thanks for the PR! A comment on the implementation.