fman 1.7.5

Video and image viewing, open-or-view, and a crash fix

• The internal viewer now plays video files (via a bundled, on-demand libmpv), in addition to text and images.
• The text viewer can now auto-reload a file as it changes on disk, with an optional tail mode for following logs.
• Added an "Open or View" command that opens files in the internal viewer and directories normally, so you can bind a single key to both.
• Fixed a crash on startup for installed builds where opening the command palette could raise an error before release notes were even checked.