[Form] Allow label field rollovers

[Zeh Fernando]

When editing a command, rolling over static FFmpeg switches (like -i, -preset, etc) should show a helpful explanation of that switch, with a tooltip and maybe a link to the official website's explainer.

This can work a bit like https://regexr.com, where the editor is also an education tool

Requirements

• Add a new json file for static documentation with a switch id, description, and optional link
• Use this file to add documemtation for the switches we already have
• On rollover of static fields, it should query this file and use the data to display a tooltip component