RFR: 8313556: Create implementation of NSAccessibilitySlider protocol

[Kevin Rushforth]

On Tue, 29 Aug 2023 10:10:54 GMT, Alexander Zuev <kizune at openjdk.org> wrote:

> Create implementation for Slider and Stepper accessibility protocols.
> Fix mapping.
> Fix performAction parameter type in declaration.

Reviewers: @arapte @andy-goryachev-oracle

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PR Comment: https://git.openjdk.org/jfx/pull/1226#issuecomment-1697321377