Updated the TextMeasurer component to use the rgba pixel format instead of gray when rendering ASS subtitles for measurement. The previous gray format was resulting in black-only pixels, causing issues with character width detection; switching to rgba ensures accurate pixel extraction for the font measurement tool.

This initial commit introduces a new MPV userscript that allows users to search for YouTube videos directly within the player. By default, it retrieves 50 results and integrates with the mpv-gallery-view script for a better browsing experience when enabled. It's currently in a very beta state but provides a quick way to pipe YouTube searches into your local playlist using the '/' shortcut.