[Feature request] Add option to load Newick file from URL

[danielhjacobs]

On https://cdcgov.github.io/TidyTree/app/, add a text input and submit button that on click fetches (Fetch API) and builds the tree from that url text input. Add it as a query parameter.

Also, related, add code that if you were to go to https://cdcgov.github.io/TidyTree/app/?file=https://example.com/input.nwk would build the tree for https://example.com/input.nwk