[MOOSE-310] Logo Marquee Fixes

[GeoffDusome]

What does this do/fix?

This pull request updates the Logo Marquee block to improve its customization and appearance. The main changes introduce a user-adjustable marquee speed via a range control in the block settings, update the spacing between logos, and ensure the selected speed is properly passed through the block's data and animation logic.

Logo Marquee Block Enhancements:

• Added a marqueeSpeed attribute to block.json to allow storing the speed setting and passing it to the rendered markup.
• Added a range selector in the block's Inspector Controls (edit.js) so users can adjust the marquee speed from 50 to 1000, in increments of 50. The selected value updates the block attribute. [1] [2]
• Updated the block's save function to output the data-marquee-speed attribute on the .logo-list element, ensuring the speed setting is available on the frontend.
• Modified the animation logic in view.js to read the data-marquee-speed attribute and adjust the animation duration accordingly, making the speed control functional.
• Increased the horizontal padding between logos in the marquee for improved visual spacing by updating the margin in the block's styles.

Documentation:

• Updated the CHANGELOG.md to document the new marquee speed control and spacing update for the Logo Marquee block.

QA

Links to relevant issues

• Link to Issue

[dpellenwood]

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