Support for uploading and sharing Hero's Paths

[GoldenChaos]

BotW DLC 1 introduced Hero's Path mode, a visualization of everywhere your character has travelled overplayed on the in-game map. Since this is saved to the game's save data, we should be able to extract it from sav files and display it on Zelda Maps.

Hero's Path has limitations in-game. It can only store the last 200 hours of play time. With this feature, Zelda Maps can become a true Hero's Path backup service, excellent for completionists.

Here's what's required for this feature:

• [ ] Display Hero's Path data extracted from BotW .sav file on map (the feature's basic behavior)
• [ ] Provide simple instructions for users so they can extract their .sav files for uploading
• [ ] Upload .sav files from account page, each .sav file should get its own unique URL
• [ ] View list of uploaded .sav files from account page
• [ ] Link to view Hero's Path map from the .sav file list
• [ ] Button for copying link to Hero's Path for each .sav file
• [ ] Delete/"x" button next to .sav file
• [ ] Stretch goal: Combine data from multiple hero's paths in a single map? "View all" button after .sav list?