Fixes formatting in sidebar at different widths. Adds Google Analytics tag. Cleans up Svelte component props.

Updates About page to main landing page, adds embedded YT video, link to help article, and updated text/photos/links

Adds initial About page; updates feedback form link text

Adds automatically generated usernames. Removes username selection and shared user store. Removes Results and Study Links views. Removes AppOld component.

Transfer IndieLabel demo version